Read online, their biographies and books, in their blogs, websites, TED talks on Youtube, Youtube videos about how billionaires and millionaires make their money.
Their mindset, habits, attitude, lifestyle before and during and after earning their money. How they KEEP being a millionaire or billionaire.
I make it sound easy; it’s not. It’s not just reading and watching, but applying, copying or adapting what works for you and leaving out what doesn’t, what you learn and practicing it until it becomes second nature and a habit.
This is changing yourself from coal into a diamond.
Some books that I think may help you:
Rich Dad, Poor Dad by Robert T. Kiyosaki
Think and Grow Rich by Napoleon Hill
How to Win Friends and Influence People by Dale Carnergie
Edited to add:
I have several demons that deal in spiritual and material wealth (for example like the obvious, money)
that reside in me. I had offered my physical body and soul as a resting place, temple and sanctuary for them to reside in me, if they wanted to.
They took me up on that. They are of the Powers of Hell. (Just to be specific.)
My experience with these Demons is that they give you ideas, and suggestions, but you have to WANT it and be MOTIVATED on your own to learn. They will definitely guide you.
It’s not just a “business” relationship either.
Get to know these Demons, they can be your friends, and it’s definitely a good idea to have a good, strong, psychic bond with them, and be open enough psychically to hear their suggestions, ideas, communication, etc. with them.
This will help you greatly and advance you in your path, whether it be spiritual or material. They deal in both.