Progress takes time, and is often a journey, and while you've likely just begun on figuring out what will ultimately work for the both of you, I think people's positive and encouraging reactions are because you both are willing to work to get there and that's a really good sign for both of you. In this situation, a lot of people would shut it down cold and it would become a major point of contention or sore subject as a result, but the fact that you're willing to research, experiment, and try to see things from multiple perspectives as well as see whether it's something that you can come around to enjoy and share at the same level as your husband, is a really positive sign.
From a physical perspective, as you continue to do it with greater frequency, it will continue to get significantly easier, and will keep feeling better. That's a big part of why we encourage people to try going anal only for a month or two if they're curious about it, because it can take some time to get into a sustainable routine with it at first, but once you do, a lot of the benefits of being anal only start to reveal themselves and it can really be a lot of fun and feel really good. It can take some effort to learn to orgasm from anal sex on its own at first, and that can be a fun process at some point if you're interested in pursuing it, but otherwise I would suggest that you combine clitoral stimulation while having anal sex, either by rubbing it or using a vibrator. The two together will often combine to a very intense orgasm. Even if interested in pursuing anal only orgasms in the future, I'd suggest just getting to where you regularly orgasm during anal from your clit at first, to really start developing that association between anal sex and pleasure and orgasms, which can really help to change one's perspective on anal from "this is something he wants" to "this is something I want". As for going to the bathroom after, you can try having him cum as deep as he can inside you so it stays inside and gets absorbed instead, or you can wear a plug to keep it inside for the same reason. If you feel an urge to expel it after sex, that's something that goes away with time for some with a bit more experience.
Attitude can play a big role as well in enjoying it, and it sounds like you're enjoying it more since you've opened up a bit more to the idea. Taking the approach of it being something that you explore together for each other's mutual pleasure, a sexy, intimate adventure, can really make a difference in how you perceive every aspect of it. Sex should be consensual and fun for everyone, and anal only is no different in this regard.