Selling template themes as part time income while learning to code

Hello everyone…
I finished frontEnd last December.
I’ve been reading here on how numerous people have gotten front end jobs already. And I congratulate them for it.

However, I read this article:

Is this also a good Idea as a passive income to learn while I earn?

Any suggestions on where to sell templates?
Any experiences you might have on the matter?

Actually is this the right question to ask?
I was hoping to practice my frontEnd skills in the real world. I realized… I can learn and study all I want but it won’t amount to anything until I see someone actually patronizing my work and consider it actually worth something?

Or do I have the wrong idea about the matter?

Thanks again.