don't know how to give head... help!

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so my boyfriend and I have been together for a couple of months and we're sexual active. but before him I was only with girls (so I know how to give head to girls but I've never with a boy) so last night after sex he ate me out and was hinting for me to give him head, he was starting to push my head down and I kinda just didn't go down😂😭 I felt so bad! But I'm scared. I've never worked with a penis before! I wanna give him head and we're moving out together in a month or so, so obviously there's gonna be lots of sex then and he's gonna expect it. But I don't know what to do! What if I mess up? :/ Advice, tips??? Help me ladies, I wanna please my man!