FidoNet does still exist, but it's commonly called "fight-o-net" for a reason, as there are... some characters there.
If you do resurrect your node, I'd suggest also picking up FSXnet, as it's the second largest network, is better maintained, and has a no-politics-or-religion rule that makes it way more pleasant to be on.
Or, you know, you could call one of the BBSs out there, and make a sysop's day by being a user, as non-sysop users are not super common, at this point. You can try my BBS at http://bbs.stormbbs.com or telnet://telnet.stormbbs.com, if you'd like to see FSXnet and FidoNet in their current lives.
But there are plenty of other BBSs out there, too, and my BBS is really only special because I have an ANSI calendar with a different graphic every day that I made 370-ish graphics for. It celebrates a holiday every day.
And if you're wondering about BBS networks in general, I recently found out about https://clrghouz.bbs.dege.au/domain/list , which has way more info than I was expecting about what the available FTN networks look like.