Be entirely sure about protection. If you are not on the Pill or an IUD, use condoms. If you use condoms, be SURE your lubricant is not the kind that will deteriorate the condom. (For example, using Vaseline with a latex condom will eat holes in the condom.) I don't know if you are old enough to drink in your locality, but a beer or glass of wine can help you relax. Just not more than one, or it can interfere with performance.
In initial attempt, one is likely to fail as there is anxiety of performance. To avoid this, one can masturbate each other .This will bring you closer sexually and as there was no failure, both of you have no frustration. This advice was given by one member. If your boy friend is confident, you may directly do intercourse, of course after foreplay and lubrication.There will be little pain for you before you get pleasure. Pain is usually tolerable.