Yes, definitely would work. I've seen online chat communities around the same concept. Forgot their names, but I've seen them linked in programming subreddits. One site I do remember is codingcoach.io.
Personally, I like in-person mentoring but the reach is far lower than remote. So it really comes down to your goal and what you want to achieve. If it were me, I'd try to find other existing communities out there first and see if I can help those instead.
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