I'd recomment getting some reference/tutorial books. You can also look for local free or low-cost courses dealing with Maya. Many universities (and community colleges especially) offer free public training sessions for a variety of things, and I know Maya is on the list. They will at least give you enough experience to start on your own.
3D animation is very time consuming, but if you get to know the software well, you can make a decent animation in a short amount of time. Maya has a lot of dynamics simulation features which can speed up certain things, although they can be pretty temperamental at times, so sometimes the old-fashioned manual way is the best way.
If you get really detailed and involved, expect to come up with about 2 seconds of good animation every week. I wouldn't be concerned about getting that far or involved yet, it'll give you an aneurysm. I guarantee it.
Right now I can do maybe 45 seconds of okay character animation every week. If it's simpler stuff like cubes flying around smashing things or spaceships blowing stuff up, then I could do 5 minutes per week probably, if I really worked on it for long periods of time.
I just finished an animation class, and we were required to spend no less then about 6-8 hours every day of the week on our projects. People that didn't have Maya at home were forced to sneak into the lab before the building closed and spend the rest of the night in there. The lab is highly secure, so even security and maintenance don't have the codes to get in. Nice hideout.