1. Yes, your meals sound way too light to me. Don't count your food, don't track it, just eat. More carbs would likely be great for you. Eat some fruit!
2. I'm not an expert in this arena in the least, but your workouts sound great to me.
3. I really don't think you need to worry about this. You're young, active, and will be eating well. Worry less, eat more!