Anal Sex

I'm not very good at anal. I'm open to it, and have done it afew times. Any tips on it in general or how to better help my guy guide it in? He really likes anal I'm trying to get better at it for him in not a huge fan of it. But I'm willing to do it some for him. **** EDIT***** He got mad at me when he couldnt get it in and told me to watch some open and learn how to fuck. That I should know how to guide his dick in. *before him I was a virgin I've never had sex with anyone else. We've been together for 2 years*