I normally wouldn't. But if THEY bring up the topic, just say it, and shrug it off like it's nothing. The key is to pretend it's not something abnormal. Anyone can achieve anything if they make it seem routinely.
here is the conversation you: so what do you want to talk about
them: hey how about we talk about something weird
You: um like what?
them:furries
you: well i actually think they're kind of cool and they are actually a great fandom who supports or finds great interest in anthromorphic animals animals that can talk and stand up and stuff like like sonic and tails and knuckles
them:wait really??
You: yeah and i find great interest in all of those things so i am a furry
them: well it actually sounds pretty cool
AND THERE YOU GO DOING ART COMMISIONS IF YOU WANT TO SEE THEM CLICK ON MY PROFILE
Make sure you're armed, just in case.
Tell them that you respect their decisions, so they should respect theirs.
Tell them they don't have to like it, but it's your choice, not theirs.
Or just don't.