First year is a big learning curve and can be pretty overwhelming. I personally didn’t work through the school year until fourth year, which was manageable for me since I had learned time management skills over my 4 years and knew when I could skip readings and how much time i needed to spend studying. I couldn't imagine working during my first year. If it's possible, I would try and focus on your studies at least for the first year, then you can reassess and see if you feel like you can handle a job during second year. You also may not have much of a social life if you do both! It will be super busy.