Giving Head

So I've been messing around with this guy for about 4 years now & we have sex every now & then. Only thing is it took me a very long time to give him head because for one I didn't know what I was doing & two I didn't wanna look stupid. Now a days I try to give him head but it's just like weird kinda cause I don't know what I'm doing lol. Can you guys give me any tips ?