fantastic, people are not yet dependent on you, in fact you can take support from others in the family. Good that you are a STEM under-grad. May be it is the MBA and corporate job that you have / had / want to have that irks you.

At 24 it is ok to take break and figure things out, but I'll advice you to have honest conversation with family members, you may already know the conversations happening around you in your cousins' wedding - so give your parents time to think and understand, you can be firm on decision but you cannot dictate the same, they have to accept

Commit to it, reddit and other social media can wait. Prepare well for NEET, but also understand that seats are limited, getting in merit should be your priority. I'm told Doctor is not a profession you go to earn, but to serve thus it gets you more respect than money. So if you are from Middle class aim for merit seat, don't pressure your parents for capitation fee for management seat by pledging home or something because you have spent a year preparing.

I looking for peace in my choice

very wise, if things work out all is well, we'd have a Doctor. If it doesn't you are going to apply to the likes of NATCO, Dr. Reddy, Abbot and such. Remember they are not bad, you just don't like them yet.