There aren't that many topics to learn. If you pick one music industry content creator, they will have around two days worth of videos that you can watch. If you do the things they say, you will make money. There's no magic to it.

Many thousands of live streaming musicians have had no trouble going from $0 to $5k/mo. You're welcome to check out Twitch or TikTok any time for evidence of this.

Anything can be proven possible by a single exceptional example. The question I would ask is what's probable.