Even if you just get a part-time job as a dishwasher, you'll be able to see what it's like in a professional kitchen. You really should observe before you make any huge life change. I went to restaurant school with no experience, and while it worked out well for me, it might not for you. (In other words, do as I say, not as I did.
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And -- maybe there is some other foodservice establishment where you might get your weekend job. Restaurants aren't the only game! Look at residences (if you're on a school campus, what about dining halls or fraternities/sororities?), caterers, even hospitals, -- they all provide food 7 days a week, and might take you on when you are available.
But I must tell you: one doesn't go to school and come out a chef. Even the best chefs on this site will agree that you are always in the process of
becoming, but if you think you've gotten there, you're wrong.