I feel awkward when being sexy🖤

My boyfriend and I have been together for 2 years now and we are now getting into exploring each other's bodies and getting very sexual. We are both virgins and a few days ago I TRIED to give him a blowjob but then I stopped after a few seconds because I didnt know how to look sexy while giving the blowjob. This happens a lot. If we are having phone sex he will talk in a really freaky manner and then I try and it just doesnt sound right . Overall, I just feel awkward doing sensual things ( including moaning) and I don't ever feel sexy . Any suggestions on what to do?