Seroquel made me hungrier but did not cause any weight gain because I was generally active and didn't eat ridiculous amounts (although I didn't eat super healthy either )

By eating less calories you are actually doing yourself a disservice: Your body will soon realize it's not getting the fuel it needs, and so will hold onto fat as a way to protect itself. Your natural metabolism will slow down and it will become harder to lose weight (even if you lose a few pounds initially).

My suggestion? Eat the right amount of calories for your weight/height (and make most of those calories healthy ones if you are able), and work on becoming less sedentary. Even starting with something as simple as walking can help. I have a forum on here where I keep track of my exercise and it helps me to stay motivated - you can definitely feel free to join me if you'd like! I mostly enjoy working out at home with Youtube workouts so I have no excuses. Feel free to PM me if you have any questions. I wish you all the best.