Hi Jayant, Ill give you my personnel opinion on your three questions
1) No it is not advised to get a hair transplant so young, especially if you arent doing anything to mitigate your hair loss (finasteride). However no one should tell you what you want to do. If you want to get a HT go for it! Eugenix is doing great work so you should be in good hands.
2) You will only be on finasteride for as long as you care about your hair or care to take it. some people have been on it for life others stop when they want to.
3) I feel Eugenix is a good clinic.