Blow job?

My so doesn’t want me to give him blow jobs. He says I’m not bad at them. I’m sure he has had better, his last gf was a prostitute (I don’t judge her, she is an adult and it’s her body) but I was a virgin when I meet him. He had to teach me which was awkward. I feel so ashamed for not being good at stuff. I’m sorry for the rambling.

I guess what I am asking is, is this normal? The online sex tips I found aren’t helpful. Any advice?