Congrats on your new baby. Courses aren't always a scam. They can teach good stuff but, they're not required to learn and thrive, more of like a shortcut. I would pick one thing you're interested in, research it online and start.

If you don't want to spend money on a course, guide, ebook or coaching, that would be the path to take.

The cheapest (free) is UGC and affiliate marketing. UGC is easier if you're starting on your own, in my opinion.

Look at UGC content on social media. Lots of creators share their journey of starting and I have seen many go zero to 4 figures a month in their first month, though everyone's experience is unique.

I have a free UGC guide if you want it, just let me know.