first time giving head 🆘

So, I've been talking to this guy for a little while and the only thing we've done is intensely makeout. I'm 100% a virgin, meaning no handjobs, blow jobs and so on. He on the other hand, is not. He knows what it feels like to go without sex, I do not, so I am not as needy for it as he is. I'm ready to do a little sucky sucky but I'm completely clueless on the topic and the "Do's & Donts" of giving head. If you can just help me out with some tips so I don't make a complete fool out of myself the first time I feel comfortable enough to do it!