You can't learn anything unless you can measure stuff. You get some sort of solar set-up, but then you have to see what it does or not do by measuring. Otherwise you are not going to learn very much.
I already had my Trimetric when I first got solar, and I was used to checking things with my DMM. I also knew what the numbers I was seeing meant.
You can measure all day, but if you don't know what the significance of those numbers is, you are wasting your time.
So it is not just about solar, it is about battery charging, battery specifications, etc.
This is where people on here differ. Some like to get into the weeds and get the whole story; others just want to go camping and get home without anything going wrong.
Or you could say, if you got home ok, that was your measurement!