Advice on Anal

I (29ftm) haven’t ever really been into anal. I realistically have only (received) anal like maybe twice. I still am not necessarily interested in it but my wife (28mtf) very much wants to receive penetration from me and I am very willing to give it to her. The thing is I don’t know what I am doing and I feel intimidated. I’m not gonna lie the strap intimidates me. I never really used one before. I have been on the receiving end but never the giver. I wanna have a pleasant experience with her and make her fantasy’s come true. Give me all of the anal advice!!!!