I’m a guy who wants to get into anal play, any advice?

I recently bought a dildo (with lube I’m not THAT new) and I’m wondering how to get enjoyment out of it. I am pan, and a switch, so when I feel subby I think of all the posts talking about anal play, and I’m wondering how I can get that experience. I’m a bigger guy, so it’s sometimes difficult for me to get the angles I would want, and I have yet to experience my g-spot. Any advice would be appreciated, from prep, to usage to cleaning tips (heh, tips). Answer like I don’t know anything, because I know enough to know I effectively know nothing.