one option could be for you to learn and practice the free opensource therapy method "honest sharing" https://medium.com/@bennibtc/honest-sharing-full-instructions-a6a1a39a2af2
and become a free market therapist. feel free to ask me any questions about this.
or you could learn copywriting with the help of chatGPT. that's a highly paid job aswell >1kUSD per gig, if done right.
just ask ChatGPT: "Can you teach me to become a copywriter?" and follow the steps (including asking more detailed questions about each step).
I would NOT recommend to get required ebooks at places like www.libgen.rs because that would be illegal and for free and you would have all the knowledge you would need.
both options might take a few months on the side for first results, but have GIANT longterm payoffs.