I think there’s a general rule of thumb that for every hour spent in class, plan to spend at least 2-3 hours doing work for that class. How many hours a week do those classes meet? I’m guessing that’s at least fifteen hours a week in class. 45 hours a week, at least, just in schoolwork and classes. How many hours for field hockey? Two hours a day, six days a week? Not including games, especially if the games involve travel. Factor in sleeping hours, eating, showering, etc… Let’s estimate that each day you use up ten hours just on eating, sleeping, bathing, etc…
A week has 168 hours. -45+ for school work, -70 for sleeping/eating/bathing, -12 hours for field hockey. That leaves 41 hours for everything else. No doubt I have underestimated some of this, so let’s deduct 12 hours for more class work, sleeping/eating, and field hockey. That’s 29 hours. I haven’t included any time for socializing. Let’s deduct Friday and Saturday night socializing, another ten hours. So that should give you a spare 19 hours a week. If a family visit or day trip anywhere comes up, you’ll be cutting it close. You might have a few hours left each week to relax, but remember you have to do laundry, run to the store, reply to emails or texts, call your family. I think a part time job would not be possible. If you are applying for jobs, internships, research positions, or fellowships, etc…you will be very pressed for time.
You CAN do it, but should you? Up to you.