>>7649299
Mouse anon here. I think you can learn a lot by drawing with a mouse and you could draw just as good as anyone else with it. If you're actually skilled, a mouse won't get in the way. However, it can be very limiting and unnecessarily tiring. Doing hatching will take you longer than it should and drawing long lines in a single stroke will be impossible unless you want them to look wobbly. Get a tablet unless you don't mind the struggle of a mouse like me.