First time getting oral

I've been eaten out before, but it was his first time, so he wasn't sure what to do I enjoyed it... for the most part i think... but i didn't get the sense of relief. Im still a virgin, and have had little experience with anything sexual. My current bf ( long distance) will be in town next week,and were planning to mess around and im nervous/afraid. I wanna have a better experience than the first time. What i can i do to make it more enjoyable and be more relaxed. Btw. I'm 21