Need Guidance for Diagnosis

Throwaway account as I don't want to get doxxed, You can skip through this part,

I(21M) am a 3rd year in a prestigious engineering college, and for the past 4 years I've had a feeling that some actions I take, or things I say are even incomprehensible by me. It took me time that this can be more than just immaturity, or lack of social experiences( I can't think of a more accurate word). I speak a lot, to the point other person is annoyed, in the last two years in college, I have never been able to pay attention to the lectures and hence my grades are bad, never able to focus anywhere, if I sit down to study, I'll be distracted in 5 mins and ill stand up from my chair just to do random things and try again. Maybe this happened becoz I took a drop year after 12th to prepare for JEE, as a mix of things added to the trauma This post will become very long if I keep talking about my actions, or my symptoms but I can definitely say, it is not normal, I don't know if it's ADHD but I think I need help.

Ok back to the point, I am a student, and my parents are your typical indian parents, I asked them for a session with a psychiatrist but they denied it saying that I am thinking too much and this is because of my phone, like they can't believe that their kid can have issues with his brain, and

I don't get any allowances, to prevent me from getting into bad habits( that's another topic), my every transaction is recorded, so

I cant go to a psychiatrist myself, what are my options to get diagnosed, after reading many posts and searching online, I thought to self diagnose( I know which is wrong) and went to buy inspiril 5mg (wanted to test with small dosage) but no where they will sell this without prescription.

Is there anything I can do, I can't focus at all, I was never able to make best of friends, no relationships, I was in a friend group, but now looking at my actions I feel like I was impulsive and insecure.