new member!

Hello everyone, so I have heard rave reviews about this site and have decided to try it. After a year(so far) of trying various diets and excersise regimes this is my last resort.
I want to be back to my ideal weight and start feeling and looking more healthy!
Any tips and advice on excersise and food would be much appreciated.
I generally would eat quite healthy, but I suppose I get a bit bored of eating the same thing everyday, I mostly start off with a porridge or smoothie, for lunch a salad , with a chicken breast or fish, and dinner usually a stirfry or something low fat but still usually chicken or fish.i would say I would eat red meat, like a sirloin steak, once a week. So any suggestions on a meal plan would be great! I want to lose 4 stone by december. I know it will be hard but I think losing roughly a stone a month can be done!I am currently at 14 stone 6 and I am 5"6. I am aiming to eat 1000 calories per day and I excersise 4 times a week for an hour. Is this good to start off with?