What kind of skilled trade should I consider?

So a few months ago, I asked what skilled trade to get into that paid decently, wasn't labour intensive, and something that was in demand. Many people told me HVAC technician among others were ideal. But upon doing further research, some trades like that, plumber, electrician, carpenter, welder, etc., require apprenticeship by law. Not only that, but within my jurisdiction, I'd have to get re-certified every single year to be able to continue working in those trades.

Then there's many more trades where getting an apprenticeship isn't legally required, but it's still recommended to get ahead in the industry. Those kinds of trades typically aren't as labour intensive and although don't pay as much, I don't really care as I have my own AI venture I've been managing for over a year now. Now true, I have also tried to find normie jobs throughout, albeit with little success aside from a dozen interviews out of hundreds of job applications both offline and online.

Finally, we've got skilled trades that only require on-the-job training and/or past experience; some of these do come with a special certification that lets me practice the trade federally, most don't. I've already done my research, although depending on factors like the local area, time of year, and sub industry, might have to reconsider the dozen trades I chose to consider getting into. I have yet to contact any employers, unions, or apprenticeship offices, but I'm gonna start doing that very soon.