My experience with ERPing/cybering is actually decently vast. I started on AIM during my teen years with people I met from RP chat rooms who were also into it, but it wasn't anything intense or long-lived. Eventually I stopped using AIM altogether and used video games.
Interestingly enough, I also did some ERPing on Neverwinter Nights, downloading the nude mods, and the hand mods that made it so your fists weren't blocks. That was kind of fun, but also not too long-lasting. The adult theme'd RP servers are some of the only ones that exist today, and many are specifically French, funny enough. Ever since Gamespy shut down though, you have to use alternate methods that allow you to connect to a peer-2-peer network so you can access servers, like NWNlist. Neverwinter Nights 2 also has a decent selection, but it's the less-optimized, though prettier cousin. I haven't used these for those purposes in almost a decade though.
After that, I kind of put ERPing on the back burner as my love for hentai manga and doujinshi consumed me, I came to FAKKU, and here we are... Until recently.
I actually got subbed to World of Warcraft by a friend this summer and started playing it legitimately for the first time. Naturally, being a literary-inclined individual, I created some characters on the more highly-populated RP servers, and there is a pretty active and diverse collection of people who ERP there, and since the game is now free up until a point, you can use it to RP with little investment besides the giant download. If you are a free account, there are some restrictions that you have to get around, but it's easy enough. Mainly with the download of a Roleplay addon that allows you to view custom RP profiles, you can read some pretty interesting people's characters or desire to RP certain settings or scenarios. Some of it can be cringe-worthy, as you stated, to most people. (I don't really care, I've outgrown the insecurities of finding things "cringy," especially being a hentai fan, it's kind of hard to judge others.) But if you can get passed that, there are many people who just want to ERP randomly, but there are also a lot of people who ERP really weird things you may never have thought of or wanted to think of before. Not that I mind, but some people might. Like RPing as futas, or animals, or desiring "bad ends" to their RPs where it ends in vore or slavery or things like that. It can get dark, but some people can be fairly normal too.
It's actually because I was doing this for a time that I learned of f-list, or made more aware of it at least, since many users link to their f-list profiles from the game's RP addon. It seemed to me that f-list is just a template, though allows customization, which is good. Whether or not "furries" use it are of little consequence since its purpose is really just to outline your fetishes (or your character's) more specifically in case anyone is interested in similar things. Then again, I only really dealt with it because it was included in people's RP profiles to give examples of things they like or don't like, which can be helpful when you're in an inn with 50 people and you're not sure what someone's into or not. If you decide to explore this further, I can give you a lot more advice, but that's the basic side of it.
Outside of that, I wouldn't know where to point you to find dedicated ERP communities other than Googling for them. You can find some pretty interesting places just by trying that and checking sites out, forum-based or real-time chats. The issue with easy to find and access real-time places is that you're really rolling the dice on what you'll find there. Sometimes you find the really talented RPers who are detailed, but other times you'll find the illiterate tweens exploring their sexuality, and of course that's a no-go. That's also where you find the simple casuals who just dip into RPing and barely use description or those who have very typical scenarios they want to act out, like high school setting or doctor-patient teacher-student roles, or taboo settings like mother-son stepdad-daughter, you name it. For some people, that's their thing though so I won't really judge what they do if they like it.
I think you're best trying to find a community that is account-based where users have profiles that are capable of being very descriptive and has good customization, linking to something like f-list, for example.
Lastly, you won't be blacklisted or mocked for such a thing (I won't mock you, at least). We may not be allowed to cyber here, but it's not exactly forbidden to talk about. I mean, this is an adult site, after all. There are much odder things to discuss, but I'm having trouble finding something that's so wrong that it wouldn't be up for discussion. I can't really think of anything. But that may be because I was a psych major and these things seem very natural to me. As long as you're not breaking the law, I suppose. Best of luck figuring it out.