Unmotivated teen needs a little push

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Hello you guys ,

My name is Shay and I weigh approximately 325lbs. I'm 5'7 and I'm a junior in college. My whole teenage experience was next to crappy because I've always been heavy. I've tried dieting and working out but I get depressed and don't want to go with what I've previously set for myself. As of Thursday I have been on an 1800 calorie a day regime , I've been to the gym once but my legs hurt so bad because I haven't works out in so long , but I plan on going back tomorrow. Is there anybody who had started at my weight and has made significant change? Do you guys mind posting pics ? Giving me some advice ? I'm just so impatient but I know that I won't lose it in one day. I just really want to change. Ugh I just don't want to give up on myself anymore. Kind words of wisdom anyone ? Also if anyone attends Penn State UP and wants to work out together I'm totally down