Are you more interested in digital or analog? Do you want to build computers or audio amplifiers? Although the underlying physics is identical, you need to build stuff (as others have pointed out) and you can arguably build more successful stuff that encourages you to keep going if you start with digital. Analog is more difficult until you have a good grasp of the theory. After that, they're both easy (until you get into RF, and then it all becomes black magic again).