I am hardly an expert in Photoshop. I call my version PS DS (as in DinoSaur era). I do have a later edition, given by sweet friend Kathy, but I can't bring myself to install is as it will render my own custom brushes invalid. In addition to making your own brushes you can purchase brush sets - there are some really cool ones out there. With this tutorial I am advocating for making your own - because there is nothing like having tools made from your own stuff.
Don't forget to save your custom brushes. At the drop-down menu you'll see "Save Brushes", click on that and name the set, and note the location. You will only get the hang of it once you give it a try. I can't answer any questions about later versions of Photoshop because I've never seen how those programs are set up but I can imagine it's not too different. Again, there are alot of online tutorials.
That's is for now....hope it's been helpful.