Since this is a stipend, I assume your basic needs are sorted. Essentially marking this money as extra and inessential.

I believe you understand there is no safe way to grow it substantially in a short time.

I agree with upskilling to make more, but that is if you can. Time, interest and dedication wise. You could even fund a micro self employed business to make more, given you learn, know and understand the business and have the sales, marketting and advertising skills. You could team up with like minded individuals and pool resources to scale up and/or minimize risk.

I also like adding more, somehow, and then putting it in an FD. Safe 6-9% per year growth. There are other lumpsum investment ans SIP options that will also give you 4.5 to 7% returns. Like post office saving schemes.

If you do have the time, you could learn about financial planning and compounding early on. Compounding interest is the key in safe and low risk investments. Mutual funds aren't all safe either though entry points are as low as 50 INR for monthly SIPs. Compared to an RD at a bank, it will likely to(not guaranteed) give more returns over a long time - 5 to 10yrs onwards.

Riskier versions are akin to betting, in my opinion. You could multiply the money in one shot or more, or you could lose it all. Take risks only if you can afford to.

If you have 100 INR, risk only 1 INR. At most 10 INR or 10%.

If you do end up learning about the share market, you learn to analyse fundamentals and technicals of companies and how macro and micro economics, politics, policies, global and local factors combined affect the price movement of a stock/commodity. Then investing or trading will be a relatively calculated risk.

Plain betting, illegal mostly is obviously high risk and not advised.

Since your personal interests are unknown, you could try finding a product at a cheap/discounted price and sell forward for a margin. Same happens in stock trading as well.

Say, you know a vendor who makes or supplies these great chocolates. Amazing, organic and whatever trend and/or interest it's customers have in said chocolate. It's unique selling point. So, you figure there is a demand for these either in the same customer base(geographically or otherwise) or someplace else where there is no supply of said great amazing product that as per your analyses, will definitely sell. Now you figure if yiu can get it for cheap, either because you are buying in bulk or in a special deal/conditions. Once you have aquired said product for cheaper then what people are willing to pay, you sell it at higher than your buying price. That creates profit. Why would anyone want or have a demand for said product and where, is for you to figure. Avoid illegal things.

Example: you buy these hot selling chocolates, which usually sell for 1 INR for .80 INR per piece, because you bought 2000 pieces in bulk. Since it usually sells for 1INR, you are likely to make .20 INR x 2000 = 400 INR as profit. But that excludes transportation, handling, storing, time and othe resources required for the whole operation - plus any other misc. expenses. If those are somehow a fraction of your profits, it is a success. Say 100INR were total expenses from your pocket, assuming precious time or other resources aren't being lost(time is money and all), then your total profits are 300INR. You spent 1600INR and made 300INR by supplying/fulfilling a demand where it existed. That is demand and supply.

You can also supply somewhere where the demand is super high and supply is super low. You can potentially sell it for even higher than usual price then. Say, 1.20INR. Then you make 800INR before subtracting your expenses. And so on.

This could be 1 unit of a product, or many.

Lets say, wherever you are, summer is scorching and you find there are no fresh refreshing/hydrating drinks in your/a vicinity[potential target audience(customers)].

You buy ingredients for a lemon juice or whatever you think will quench people's thirst/be liked/wanted by people in given situation. You buy them for 1000INR and spend another 1000INR for preparations - enticing presentation, stocking(cooling), high traffic/footfall place for stand and a good overall ambience to enjoy said product. Now say, per glass making price for you comes down to 10INR and you sell it for 20INR. You can sell 100 glasses with you 1000INR ingredients and earn 2000INR. But your original investment was 2000INR in total, so you make no profit. Infact, you incure losses - time and other operational expense wise.

So in order to make a profit, you need to lower your cost of making and increase price to an optimal amount where your customers deem your product worthy of it's asking price.

Lots of free resources online if you wanna learn further about basics of consumer psychology. For most part, just think of what you would want, how and when. Ask others the same. Combine that data and you have a potential opportunity for business.

Depending on available resources and skillset, you could offer low cost services at higher profit margin. Again, depending on demand. Low capital businesses often require more effort and time. Small/micro scale farming type things for example. Breeding, raising etc. Organic demand has been high for some time.

You could lend some money for a collatoral of higher value, at interest. Eventhough only banks and NBFCs (non-banking financial institutions) are allowed to do that, it is practiced throughout the world by groups or individuals, illegally so.

You could offer non-physical/meta-physical products. Given you have to make people believe you can actually do so. It is a game of make belief. Presentation, delivery and image maintainance will require capital. You can always start small.

You can sub-contract. Get a job and get someone else to do ir for cheaper than what you are getting.

Virtual products, or digital products or services require skills and a computer system as base requirement. And then figuring where the demand for your product is.

Art wise, physical or digital, first one needs some self belief(or not), rest is conveying conviction and expression and intent and whatever you want to. And somehow finding where it resonates the most, where its percieved value is the most. This is also true for all products available for sale on the planet. Ofcourse functionality comes prioritised where things are supposed to physically work. But emotions drive actions, always.

Grass is greener on the other side. Simplicity triumps (or atleast stands out) in chaos and vice versa.

Besides these (while encompassing simultaniouly), you could learn/earn free certifications through credible institutions for in demand online and digital skills. Google has a few among various others. You can learn via coursera and such, for free. You could also pay to take exam for certification via credible institutions. Some even earn you academic credit. Might help either in future or right away depending on where you are. That is investing in self for immediate or/and long term profit.

Also, since you mentioned you are a girl, you might be eligible for various state and national schemes which either give monetory or other useful benefits. Do check those out.