I would highly recommend checking out online education. Along with many others that feel it could be sketchy or not worth it, I would have to disagree for a couple factors. In my opinion, in today's era I feel a college degree whether its a BA PHD or whatever it may be, will only help you find a career that you are happy with along with giving you more options in what direction you want to go. One site I would recommend is
http://www.onlinemathdegrees.org . It has a ton of information in regards to what you can do with your degree, growth opportunities, different programs they offer and other Q/A's that you are looking to have answered.
I do understand that alot of online institutions get a bad rep but if you do your research I think you can find a great program that fits exactly what you're looking for.
http://www.onlinedegrees.com/ is a good website as well to research a little bit about different programs offered and what schools would work best for you. I just think if you're that up in the air about taking an online course, you should research different schools and see what fits the best and try it out.
best of luck!