It all comes down to this! If you have a job or not, and what kind of job it is. The day has 24 hours, about a third goes away when you sleep. Another third goes away at work. You are left with one last third to study and have a life besides it. Then i guess if you have a job that requires thinking or perhaps mentally being present, it will be harder to study when you get home. If you have a mindless kind of work where physically pressence is the only requirement, you will have more energy left for studying.
But if you dont have a job at all, you will have more time to put into it, but one cant quit a job if you dont have anything to replace the income with.