As long as you get your EFA's in everyday you should be fine. I used to get advice online about diet and training, but I ended finding out what was right for me through researching and trying out different things.

When I was lean bulking I would only eat around 300g of protein, 200g of carbs and 70g of fat per day. That was plenty for me to gain muscle and minimise fat gain.

For me personally, I cut out carbs to less than 50g per day and fat less than 30g per day. I prefer to keep weight training the same as you can gauge whether or not your losing muscle e.g. if your getting weaker. Yeh definately increase cardio, I'd start doing it now so you've got a good fitness level before you cut.