The best thing you could do would be a Private Pilot License first. This will help you gauge how fast you learn and your general flight aptitude. Do this BEFORE paying for a complete commercial course. Many schools will promise you a commercial in 6 months; there is little way to know if that's possible personally for you unless you go through a pvt. course first. Even then, you still will have do the instrument course later, which for most is the hardest training in the syllabus and can take quite a while to complete.
Here is a resource that you may find helpful.
AOPA Flight Training - Flight School Directory