Maybe I'm wrong, but what I've seen, I think it depends on what specifically you want to do. ie, modeling, animating, lighting, special effects, etc. I look at end credits now and it doesn't seem like one person does it all.
I'm guessing the first step is to decide what you specifically want to do. Then, do some research on the requirements for that job title. You should be able to search google for game companies and search those companies for job descriptions/requirements. They may tell you what software they use, what skills each job requires and so on.
That's just what I'd do if I had that question. Good luck!
Don't be satisfied with what you can do but rather strive to do the things you can't do!