Forget everything I said about making textures in Blender. If you’re reading backwards in time, just ignore what I wrote about it. (Maybe not everything. The trim sheet stuff could still be useful.)
This is the way to create new textures!
Material Maker does look somewhat intimidating at first when you download a premade texture and open it, but with this guide I had a material in progress with 28 nodes within half a day and already understood 99% of what all the nodes and settings do.
In the last six minutes the video starts getting really fast, and the last 3 are just at a completely insane speed. But if you go through it step by step and take a bit of time to try out the various settings before continuing on to the next step, it really isn’t that difficult. And the utility of this is fantastic.