I don't mind the struggle so much as the uncertainty. Will I be able to get a good job? Will I be good enough to keep it? Will I be good enough so I have enough

I don't mind the struggle so much as the uncertainty. Will I be able to get a good job? Will I be good enough to keep it? Will I be good enough so I have enough free time to enjoy other parts of life? If I had a definite yes to all those questions, I wouldn't really mind as it would be the normal process of learning. But going through all this just to fail or plateau at a point where I have to work 12 hour days everyday to do what the guy next to me is doing in 8 hour weekdays is not the life I want.