Let’s see, let me think about this, here’s a few suggestions: First, try asking your husband what he likes. You can use this to frame a more positive expectation for him, since this can build his confidence for sex.
assistant
Ok, well you could tell him some of the things you like. Ask him what he’s interested in, and make some suggestions.  You could also include some of the things you like in your requests for things you’d like him to do. That might also be a way to get him to talk a bit more openly about what he likes, which could help you figure out more ways to get him off.  You can also give some simple tips like putting a finger in your mouth while you’re going down on him. If you can get in the habit of kissing and touching and talking while you’re doing oral sex, that can help build a mood and feel really hot. There are some other things you can try too, but I’ll have to leave it to you to try them.
assistant
How can I sexually arouse my husband?
user
Well, there are a lot of potential ways to do that. It depends on what your husband is really looking for in a sexual experience. It’s probably easier for me to know that if you can tell me a little more about him.
assistant
He enjoys oral sex but I need tips.
user
Do you want me to tell you a list of sex tips for oral sex, or tell you how to use your existing oral sex skills to make your husband feel really good?
assistant
Tell me some oral sex tips please.
user