> should I do to be financially stable?

Find out something that is some combination of (A) Difficult / requires skill, (B) Unpleasant / undesirable, and (C) Necessary

"Diving for treasure" would fulfill A and B, and scooping dog shit would be B and C, but you really gotta tag all 3 to make the big bucks.

That usually means things like plumbing, tile setting, and other skilled vocational work.