Friends with benefits

I have only kissed two guys and I now have a friend with benefits and I am very happy. Because I am so inexperienced, I feel really self conscious. He wants me to talk and moan, but I’m scared to for some reason. I gave him a blow job but then he just jerked off and finished in my mouth because it was taking too long (at least 30 minutes). I want to do more without having penetrative sex. Any tips, stories, or advice?