Then, I got married and quit my job.

After that, I had a short-term job, but I didn’t work for long.

I studied hotel management, but I got a job in another field.

Or a different field

After that I had a short-term job, but I didn’t work there for long.

I studied..

Maybe change the title to reflect the whole post. Something like, "Where I'm at now".

I studied hotel management, but I got a job in another field.

Then I got married and quit my job.

You can connect this to the previous sentence like this: "and then got married and quit my job."
Your sentence above is perfect, though.

After that I had a short-term job, but I didn’t work for long.

No, no.

Why the "no, no"?

I’ve been working from home.

I’m a stay-at-home mom.

"because I'm a stay-at-home mom now."

No, no.

Why is this here? Everything else seems to be correct. But the "No, no" sounds like you're responding to someone's question.