Loosing my virginity tomorrow😬HELP!

Hi yall, so pretty sure the deed is going down tomorrow. I’m 15, I’ve been with my boyfriend for 6 months this week. We’ve done “stuff” before, he’s gone down on me + fingered me (sorry if that’s TMI) but I told him it was ready, we’re getting condoms off of a friend. And we’re gonna be left home alone tomorrow for a few hours. The nerves kicked in this afternoon. How do I prepare myself for this? I have lube as well, definitely using that. He’s gotten 2 fingers inside me without pain. Any last minute advice? Thankyouuu x