"Whether you think you can or think you can't - you are right." ~Henry Ford
How much attention do you pay to the language you use when you are thinking to yourself? Do you use the word can't and then promptly think of something else? The language we use in our thoughts can create a better life for ourselves or stop us dead in our tracks.
Which is better?
I can't or I don't know how to yet. Can't is final and allows no discussion (powerless) whereas the the second statement says I can do something about it (options).
We can have a job (something I have to do) or we can have a career (we have choices).
You need to be careful of how you represent things to yourself so that you are reminded of your basic right of choice rather than you have little or no say in the matter.
Spend some time thinking about how you talk to yourself and whether that is holding you back from the future you want for yourself.