I usually use Photoshop and a tablet by Huion. Sometimes I use Clip Studio Paint on my iPad. If you're just starting out, I recommend Clip Studio Paint over Photoshop: it pretty much does everything Photoshop does but better in terms of illustration. (Photoshop is better for photo editing, text, and filter effects.) Plus, CSP is a lot cheaper. Huion tablets are ok if you want something cheap, which... you do! Since you're just starting out. Whichever brand you pick, know that bigger does not equal better. I've noticed that despite owning a large (screenless) tablet, I tend to draw only on about 70% of its total surface area.