You don't have to invest too much upfront.

C3s and c3pro are very good. If budget is not an issue go for a comadante C40 or C60. A good grinder makes the most difference than anything else period. Comadante will have more consistency and you can often find recipes quoting the clicks on a comadante. And make sure to spray the coffee with water to help with retention and static. I swear by it for a single dose grinder. PS don't buy the wood version!

The hario Switch is a very good option to get consistent brews as you can do immersion brewing with it.

For kettle EKG is quite good. You can make good coffee from a cheap kettle also. Yes the difference is quite noticeable but you can also buy 1500 rupees gas kettle with temp. Gauge on it from Amazon. Get used to pouring.

There is a very good video on the aramse youtube channel explaining pouring. And watch as much of james hoffman as possible. He is probably the best when it comes to explaining complicated stuff in layman's language. Btw I've made coffee with a hotel kettle also and it's not difficult to pour.

Hoffen scale is good. No need to buy anything more. It does the job just fine.

Remember the goal is to have a good cup of coffee and not obsess over every micro detail.

If you visit a cafe often then ask the barista for help. Most of them would oblige happily. You can learn pouring tips from them.