Whatever online college you choose, make sure it is accredited.
Also you need to ask yourself what other previous academic experience or exposure to the skill you want to learn and how is it going to relate to your life?
Since motivation is one of the most important factors to succeed with distance learning, your online education has to have a goal/purpose if you have to succeed. Are you seeking grades for credit? self-improvement? job, salary or status advancement? or are you simply a life-long learner? Whatever you choose, make sure you choose a course or degree that interests you.
This website below provides more information on distance learning, tips, guidance, online colleges and more.