How do I create an Ai design for someone I follow on Instagram?

Please tell me how and how you create illustrations with unique and cool designs based on the Ai designs you follow on instagram.

I would also like to know how to make a side business or income from ai illustrations.
How to connect your interest and favorite hobby to income
Thank you very much.

https://www.instagram.com/palatiumanimi?igsh=Y3QxajgxY2JjbGIz
https://www.instagram.com/rohkiofficial?igsh=MWY0c2lnZWs4MjBraA==

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