Many will just have work study during school and not any kind of a real part-time job. You will be pretty busy, don't fool yourself into thinking that you will have plenty of time for a job too. If you think you can handle it go ahead and try it out. It may not make much of a difference though because you won't be able to work many hours. As in the post above, they just worked weekend hours and that was it, not much. I think most opt students find it too difficult to hold a job though.