I don't think anyone really has limitations to how much they can be a success. Unless it's a physical limitation, which no one can help. For example, I always dreamed of joining the army and being a marine, but I ended up breaking my neck in my early years so I can pretty much count that dream out.
When I started my last job, no one thought I could do it because i had no experience. After many weeks of the "i hate this, im gonna quit" attitude, i eventually became the top employee just a month later.
Your only limitation is yourself.