You're in like Flynn (my husband's saying). No worries what-so-ever. That's my favorite size to receive, BTW, but because it's him. If he was less or more no problem either. Harder to adapt to more size (I think), but less size I'd manage just fine.

Worry less about your penis. You are going to have the equipment you have. At 15 you're a long way from there. By the time you are fully developed hopefully you'll realize that anatomical proportion is the least important part of being a good lover.

Thats big