Losing my virginity

I think I'm finally ready to swipe my v-card. In my early 20's and have only given oral/ let my boyfriend touch me. But I'm ready to go all the way.
Obviously I'm needing to find a doctor, I want to be smart about this, I'm not ready for a child. 
Any advise for the first time, lube, condoms, relax, what I do after I happens(physically)?