Can you get a good job as a computer specialist by just going to community college?

It is possible, but not the best route. You could get qualified to work a help desk or desktop support work, or work in the repair of equipment, but will be competing with 4 years of college graduates for these jobs. You could get a job poorly paid phone support, but what you really want to go to school for 2 years just to earn $ 8 - $ 10 an hour? If you're good you can, of course, how they work.

The best option could be:

Start with the community college, but continue after that to a degree. Marketing and profit potential will be greatly improved.