selling e-commerce stores

hello
full stack web developer
i can build e-commerce stores from A to Z
please tell me how can i make profit with my skills

Built a site with free design resources as a side-project and monetized it after it got traction. I'm now looking to take it fulltime after slowly growing it to $1K/mo over the last 4 years.
A decade ago, I also built flash games. It wasn't very profitable. Landed a few $500 sponsorships and nothing substantial from ads or game sales. I want to get back into building small games if my other project can grow where I can afford to take less freelance work.

we can work on a project together