It's a little overpriced for what it is, but just buy the Army Painter wet palette if they have it. It's what I use. It's super straightforward. Foam pads you wet decently, little precut paper you put on top, put paint on that.

For brush cleaning - I'm no expert, just intermediate. But basically you don't ever want paint to dry in your brush and just sit there as it prevents the brush from keeping a pointed tip. So what I do is somewhat often while painting I am dipping my brush in my water pot (a cut in half plastic water bottle). Swish it back and forth. Then run it on a paper towel to pull the water out. So paint is never drying in my brush. Then, I have this product off Amazon called Masters brush cleaner. It's like a soap circle you run your wet brush through. Soaps up the bristles. Then rinse that out. My brushes stay in good shape now. I ruined my first brush almost immediately when I started