How nice to find someone else who had the same thing happen to them as I did. And I'm so sorry that whatever you invested didn't turn out to be what you expected.

In my experience something similar happened to me luckily I didn't buy many only 3 and from them I learned very little because most of them already knew what they were talking about.

I bought an introductory course to procreate and only learned where things were . They didn't teach me much, just the basics (so much that I had to learn how to stabilize the brush by myself).

Now I recommend you to watch lalin San's videos on Youtube.
Here is the link

It's just a video to send you there. He has many tips and teach many techniques and the best thing as it is free, if you do not like it you have not lost anything.
I hope it helps you

You can use (Automatically translate to English) because I am from Ecuador.