I did that when I was at college, study in the morning and work in the afternoon, it was a really good experience, as in the morning in my opinion we are with more energy, fresh mind. And work give me a good perspective of "real life", could know new people, and start to understand how the market works.
try to find something even simple, but that you like, you can question your self, what i do like, do I like to talk with people, enjoy to use computer etc
And to keep you work life balance, make sure you use your morning pay attention so will not have to study so hard at night for example for the testes. do simple things with your school friends to feel you keep in touch with then, lunch time next to school or you job. keep talking with then trough whats up, and choose to invest 2 3 nights to study if necessary to be more free on the weeks. Planning sometimes can be boring, but when we have less time, it is a good option, because you know what to do, and organize your week.
finally have fun have fun have fun, not just in your personal life, choose something you like to do, that will not became your day a hard day :-)