Try 2300 for more then a week. It would be normal to gain weight the first week when you increase calories by 500 (how much did you gain?). Are you weighting yourself at the same time/ under the same...
How long did you stay @ 2300 calories and how much did you gain? It might have been water weight + extra food in your stomach. You can't begin with 1800 calories, you have nowhere to go when you...
Eat, lift, sleep, don't overindulge. Ask your parents to make ''healthier'' alternatives (food wise), make your own food and don't stress it. Use common sense really.
Do heaps of people also have nutritional knowledge? Gains? I lack both but it doesn't stop me from having leftover chicken parmigiana pasta for breakfast and cereal pre bed.