Oral sex for the first time

I'm 21 y/o & im a virgin. The guy I like is 21 & a good friend of mine, he so sweet & likes me too. He's not a virgin which isn't a problem to me & he likes the fact that I am. He is the only guys that I've ever met that actually wants me to wait to have sex. Other guys I've met try to pressure me all the time but I never fall for it. He always let me know that when I'm ready I will not & to not rush cause it's not worth it. Recently he spent a night and we always end up touching each other, not like that tho😏 we started talking about oral sex and I mentioned to him that I've never done that. ‼️Mind y'all I'm a straight virgin I've never done anything besides kiss‼️ he asked me if I wanted head, it's up to me and plus he's into it too but he wants to make sure I'm ready. I told him I have to think about it & im really considering it. What should I do to make sure I'm right down there? I eat the right foods all the time, i eat fruits and I drink damn near or right at a gallon a day and I wash that area throughly all the time! What else should I do & what should I expect😏? I'm anxious af!!!