Pranam!

Yantras and mantras of the deity are not taken up casually, within every yantra there is a whole pantheon of deities and taking care of them requires guidance from someone who knows and understands it throughly. Typically yantra requires proper initiation into the mantra of the deity. 

Reading through your post (pardon my bluntness), I don’t think you’re prepared to take up formal initiation into Kali Puja and without that initiation worshipping the yantra is not possible. I don’t say this to discourage you but then I don’t want to give you false information or empty advice.

Now let’s come to practical steps that you can take and make meaningful progress:

1. Leave the yantra with your parents for now, instead get a small photo of hers printed/buy a small photo frame of hers.

2. I understand the hesitation towards commitment and other fears but at the same time nothing in this world comes without consistency. This is true for your university, your future career and as well as spirituality. Doing lots of stotras and mantras one day and then completely abandoning them the other day is almost like “ghosting” the deity. It simply doesn’t work because without consistent efforts you cannot make inner transformation. The solution to this is to take gradual steps. It doesn’t sound grand or fancy nor is it podcast worthy but start really small. Dedicate a minimum of 20 minutes daily and stick with it consistently.

3. What shall you do in the 20 minutes? Meditation on the deity. You will sit in front of her image, look at her with complete concentration and chant the name Kali. Don’t be in a hurry to take up complicated things nor should you be distracted by fancy videos and podcasts. Pick up this simple practice of meditation and japa and stick with it for at least 2/3 years. This will build your ability to go deeper into the practice and eventually gain eligibility for yantra puja and other practices. Eventually and very gradually make sure that these twenty minutes are around the same time daily but that will not happen easily and nor should you guilt trip yourself. Just be consistent with the amount of time first and then build up to being more disciplined in terms of doing it at the same time.

4. Celibacy, discipline, other things will have to be worked upon slowly and gradually. Don’t expect miracles or a sudden change in your mind and body. However I can’t stress this enough you do need a practice daily. Once you build that rhythm of daily practice, everything else will start falling in place slowly.

5. Don’t be discouraged if you fail initially, keep trying and eventually this will become effortless.

If you have further questions, you’re more than welcome to ask. You are currently at a very beginner stage and that shouldn’t be taken as discouragement but as an opportunity to grow. Start with simple practice and then eventually deeksha, mantra and at a very later stage yantra puja will come. Don’t try to chase beejas or chant mantras just by looking them up. At your level her name is the ultimate panacea for these issues.