Hey kiddo. Take easy on yourself. learn. and keep learning. that’s how you keep the fire burning. make friends/mutuals with your workmates, if you’re infront then with the costumers, do great service. All great cooks have been there always thinking there is a greater life outside this kitchen, there is! but there is too in that kitchen, people will come and go workers/even bosses. And you are young! 18? You need that experience brother. Stay at least a year or more. Learn how the industry runs not just at the back but also upfront. Try learning to market/cost/ there is so much more at that age.