Apoorvat do not self medicate at any cost ( cause you need doctors for legal help and also if anything goes sideways )
first get to a therapist then a endo.
social transition is completely individuals preferences.
if your social circle is okay with it good go ahead no issues and this will make it easier for understanding and exploring yourself.
social transition prior to medical transition will help a lot in mental state of mind but medical transition will help a lot in physical changes That past puberty become irreversible.
some may say you are too young to know yourself etc which might be true but these are the same people who clap on when a 14 year old gets a degree or does something great... so a good therpaist help and proper exploring yourself and a good friend should pretty much put you in the right track