If you want to enjoy it first and formost, don't try it with clients. You know what they're like, shoving things in as fast as possible and as deep as possible.
Try having a bath and getting yourself off normally, then introduce it with 1 finger, then 2, then a super small butt plug. (over periods of time of course not all at once lol) then a meduim one THEN actual anal sex with a partner and then when you are confident you can do it, offer it to clients within your own bounderies "at discretion". I can't ever imagine not doing it at discretion tbh, big ones will never ever get there. Your butt doesn't lubricate plus if your a virgin it wont be ... stretched. Vaginas don't "Stretch" out of place but bootys do.
If it becomes part of your turn on routine, you'll miss it if your not doing it (I used to HATEEEEEEE anal. Just felt like pooping) I prefer the stimulation rather than the being filled sensation so I still have a size limit with it. But it's an incredible leap and I guess that's how everyone gets into anal. Hating it to enjoying it lol.
It does seem every girl offers anal when you don't, but hey, if you never get into it I wouldn't feel bad, we don't have G spots there. So it's not like things are supposed to go there. It's more assocsiating the stimulation say with sneezing or stretching.... as a sexual stimulation. It's a pleasurable feeling but not nessisarly sexual but you can team it together to feel that way.