soo I need help

I'm 19 and I am soon thinking of losing my virginity to the guy I'm dating as I trust him. and I feel like he respects me and is mature as he is turning 21. I'm a little bit afraid tho as he has had sex before and it's my first time, also he wants to give me head and I've never let a guy finger me or give me head and I'm scared of what will happen and what it would be like. do you guys have any tips on what I can eat or do to make sure that it's a pleasant experience for both of us.