Tired of arguing over this

So me and my husband keep having this same disagreement and I just want opinions on how to deal with it or how to better explain it to him. 
My first love (highschool sweet heart) used to tell me that he didn't like my oral sex and that i was pretty much not that great at it. Soo over the years it kind of made me develop this insecurity of giving oral pleasure to anybody. I'll do it if my spouse likes it but not as often as most men would probably like. Now that I'm married it's not that I mind doing it but I'm soo insecure about it that I guess I just feel like why bother to do it if it's gonna be bad? My husband says he enjoys my oral sex but to me I still feel like it's not that great. I just want him to understand how I feel about it and also understand that I will do it but I just really have to gain more confidence in doing it. Any tips on how to make this work or how to get over it would be greatly appreciated. We are also still newlyweds so we are still learning each other