First time nerves and help!!

This is probably going to sound really strange but one of my friends has just asked me for sex. He’s said he really likes me but I told him I’m not looking for a relationship, and he said that thats ok and we can do it no strings attached which I’m ok with because I feel ready to do it. I’m nervous because I’ve had bad experiences with being intimate before, I’m the legal age and everything but I’m just scared to actually go all the way. Any tips on how to get over this because I’m sure everyone’s first time must be scary or any tips on how to actually have sex because I’m hopeless, TIA ladies x