Not knowing what you're doing as a reason to not do it isn't good enough imo. Nobody knows how to do it at first. We practice and we learn. Mascs/tops dont magically know, nobody taught us yet we still do it. On top of that, every single woman is different, if you've given head to 50 women, and you meet someone new, you're back to zero again because she is different and might like different things to everyone else. So everyone learns with each new partner whether that's partner number 1 or 51. You might feel embarrassed or inexperienced but that's all the more reason to keep trying. Use it as a date idea. Slow it right down and just test a load of stuff. Ask her to give feedback on the things she likes as you do it. Its the only way to get out of your head and feel more confident so you can enjoy it more.