And draw, and scan photographs and real objects, too, and make collages, and do a million other things as well.
Computers are a wonderful tool that artists can use to make pictures.
I have a PowerMac, but just about any type of computer will work. You must have a drawing or painting program. The one I use the most is called Adobe Photoshop. It is too expensive for the casual user, but there are many other programs available. Making weird textures.