@kars Hello,
Don’t take this personally, I believe u need to hunt for a better paying main income stream. This is because I personally believe ur working hours and pay don’t match
My wife used to work in retail (pre-pandemic) about 4 years ago and Is out earning you. Instead of trying to learn a new skill, find a better job instead.
My guess would something sales orientated , if you want that fast money.
Nevertheless, good job in having a plan. Ur on the right path.