What are some good careers in animation? And is it a good choice job-wise?

Most animation is done on computers these days. If you want to draw, the best bet would be to be Korean.
Failing that, the best way to be noticed is to create your own work, and put it online. If someone likes what they see, you could be on your way.

Here’s a place to start your exploration. This is also a great blog that discusses the art and the industry of animation.

My friend Greg does voices for Anime movies. He just happened into it. You know, right place, right time. To make ends meet, though, he also DJs when he goes to conventions. You can get as far as you want if you have a way to get in the door. I know him very well and I can’t get in. Pick something and stick with it. Somebody will notice.