blowjobs please help me

I'm currently dating a guy who is very experienced. He is always very giving to me. He goes down on me and make sure I'm very satisfied before he comes. Ive never given him a blow job. And I feel like crap about it. I feel very insecure about my blowjob skills. Before I dated him, I dated a guy who could never cum from a BJ no matter how long I stayed there working. He never moaned or anything so I honestly feel like I'm prolly not that good at it. This guy I'm dating has prolly gotten really good BJs before. Idk. How can I resolve my issues? Should I talk to him? If so, how? I don't want to sound like a big baby either, but I do want him to help me become good at it, in a very gentle and sensitive manner. I want to do it but I honestly feel so stupid when I'm sucking on a dick lmao. Idk if anyone really understands that. I'm sort of a prude? Idk lol