oral..

I've been with my man for awhile almost two years and I've only given him oral a couple times...I'm not very confident in my abilities but I don't feel like I'm being fair to him by not even trying. I just feel really awkward about it all. I need some tips ! Tricks of the trade I don't know what I'm doing! I saw a post that said "if your girls not giving you head cheat" and I don't think he would but he deserves it every now and then lol