Is Graphic Design For Me?

I went thru Autocad training years ago. I worked at it for awhile but got burned out. Now I'm wondering if I should try graphic design. It's really not that different from Autocad. Most of the basics I think are the same, but I'm not sure. I really would like to learn to design, but can I get work in that field? I want to continue to work at home but do things I love. The next question is how much training am I going to have to do to do this? Is it a crazy dream? I am 54 years old so I'm just not sure. Does anyone have any ideas or thoughts?