Learn something that's in demand that you like doing, and work for yourself.
If you don't want to learn something, find something that people don't want to do.
I have a landscaping business, which takes knowledge and skill, but I started cleaning gutters as an add on last fall, and I'm making so much money doing it this fall that I've let go of both my employees and all their bullshit.
I charge $99 to clean the gutters on a 1 story house, and $200 for a 2 story home. I'm grossing over $600 a day right now, and my overhead is almost nothing. Like I net over $500 a day doing entry level work with a few ladders, a Blower, and a 100ft garden hose because people are fucking lazy, scared of heights, or too old to do it themselves.
I'll be back to running a crew of fuckups in the spring, but I wish I could just clean gutters all year round and make six figures listening to podcasts all day.