How do I manage my time to do my homework, and work?

If I get the job, I will be working a lot. I have a college English cl, and math(which I am LD and it takes me a long time to do homework b/c I don't understand it) and I have a tough Civics teachers that gives us study guides the day before a test every other week. We have a lot of homework. So if I work from the time I get out of school, until I get home at 9pm, and I have to take a shower. and what if the days I do have off, we don't have homework and the days I work I have homework? so how do I manage my time to do my homework, and work?