Trying Oral for the first time!!!

Briana
Hey everyone. 
I'm super nervous. 
My only experience with being eaten out happened when I was 14 and it was terrible. I got nothing out of the experience what so ever. 
After the terrible experience I never tried it again. I was convinced I didn't like it. Now that I'm sexually active on a regular basis I find myself wanting my boyfriend to go down on me. He wants to try it out as well (he isn't very experienced in that field either). 
BUT IM SUPER INSECURE ABOUT EVERYTHING DOWN THERE. 
ingrown hairs 
The color of it 
The smell
The taste 
What it looks like. 
EVERYTHING. 
We're doing it tomorrow. Any tips on helping me enjoy this?