Talking during sex

I think i have a huge problem and i need your advice ladies. So my BF really loves to talk dirty during sex and I’m always freaking clueless

He tried to tell me how to do it but he was so vague. I mean what does it mean “ tell me what you want to do to me or me you?”

I want to have sex and have a great orgasm

And when i tried to dirty talk he just laughed and told me to relax. So basically i suck at it. Any advice on what to say?