Oh, well, you go to this forum:
viewforum.php?f=21and post the name something like: Latroma's Flower Shop!
Or something that you want to base your art off of. You could do animals, humans, flowers, sunsets, whatever! People will pay you CS pets for your work, and let me tell you, your art above there is worth at the least, two rares. I would definetly go into the "buisness" of animals if you can draw them because people love having art work of their fursona's done and all. (Fursonas are animals that are made up, they represent that one person. Usually you only have one, here's an example:
http://s953.photobucket.com/albums/ae20 ... UBTXT1.jpg)
You need rules, like "no stealing, use outside of CS only with my permission" or whatever you want your rules to be, then you have to give samples. This, for one, would be an excellent example. And for the fact that you did it with a MOUSE adds to your epicness and skillage. ;) But to answer your question, tablets usually range from 50-100 dollars that I know of. You might see an ad for the bamboo tablet if you look around on the forums (on the "google leads" things that move at the top of the page. They are usually really annoying, you'll notice them) Then, after that, make a wishlist and walla! You have an artshop! PM me on how to make a wishlist! :D