Joint with exercise would I lose weight eating this diet?

I eat oats (porridge) when I am bulking trying too gain weight. They contain huge amounts of calories. Its more about lifestyle changes that diet and exercise to be honest. If you make a lot of changes quickly the chances are it will fail, Start with a few changes and go on from there it will become part of your lifestyle then. You are far more likly to succeed in the long term. You should get your fat % checked and aim too loose fat not weight as weight goes up and down all the time, Most bodybuilders with low fat are classed as being obese acccording to there bmi.