Need some advice!!

I would describe myself as a rather kinky individual. I’m into a lot of kinks. Mainly a subset of BDSM- this honestly doesn’t matter, just giving some background.

So I was talking to my Dom a few days ago about things we’ve always wanted to try, but never felt comfortable talking about. Well, for me that’s doing anal. I used to be like “Hell no We won’t go” when it came to the topic of anal. But whenever i see porn (the amateur stuff, because i like realistic shit lol) and they do it, it looks so enjoyable and it’s a turn on for me.

But my ass is tighter than a pop stars skinny jeans and like relaxing isn’t enough to make it easier to access. Any tips ?