Thanks! That really helped! Another question is what does the paths tool do? Or more specifically, what is a path in GIMP?
The Paths tool in Gimp is a tool that can be used to easily create curves. When you click the tool you'll see some options from [Create] to [Edit] to [Move] as well as some other things. Frankly, I never found the Paths tool that useful so I really only know about [Create]. Basically, if you click the tool and you're on the option create, then click on the canvas. You'll see a node or a point appear. If you click again on the canvas in a different area then you'll see another point pop up as well as a line that connects the two. This line is what you can manipulate to create curves.
Grab the middle part of the line and drag it somewhere. You'll see the line transform into a curve. You'll also see some "handles" appear. These handles can be used to move the line as well, its normally used for a more precise curve.
Now if you change tools you'll see that the paths you created disappeared. Thats because you haven't made a selection yet. The easiest way to do this is to (After you've created your curve) click [Selection from Path] in the tool options. The way the Selection works is that it'll fill in the rest of the curve using the two points, normally in a straight line as you can probably tell. This can sometimes cause issues if you are using only two points, so I recommend you use at least 3.
Thats basically it for the short insight I suppose for the Paths tool, any questions just ask.