Ok mate, I'd probably start at 1800cals. Split your macro's at 50/30/20 pro/carbs/fat.

Focus your carbs pre and post workout.

Amount of meals doesn't matter, there is no metabolism boost from eating lots of smaller meals. And at 1800 cals you'll likely want each meal to contain as much food as possible. I'd put that few calories into 3 or 4 meals.

7 meals is ok when you have 4000cals or more to eat.