Blowjobs ?

So I'm 18 and I've been with my boyfriend for 6 months now, who's 21 and I lost my virginity to him a few months ago. All the sexual things I've done with him have been my first too. He knows this and respects that I didn't really know what I was doing at first and is really cool about it. I've always been nervous about sucking his dick and he always tries to suggest that I do it but I always get too shy and never end up doing it. I think it's mainly because I don't really know what to do and I'm embarrassed that I might do it wrong or something and he will think I'm weird. I want to please my boyfriend and I know that blowjobs are a massive turn on for him so I want to be able to do it for him especially since he gives me oral. Any tips?