I can answer a couple questions and give a bit of advice.
Take your creatine before and after you workout or when you wake up on non-lifting days. I'm not sure about the glutamine, but I know its in some protein mixes so you might just take it with the shake.
Usually when its time for me to take my supps, they're all going down at once (protein and creatine usually for lifting days). So unless your noticing discomfort it shouldn't matter that you're combining things. Its a personal preference as far I've seen.
Take a shake before your workout, how long before will depend on you but I would try 20 minutes to start. Take another shake right after you workout. On off days you can have a shake here or there with a meal but I would highly suggest you address your diet with real foods and not supplements.
My last piece of advice is , imo, the most important. Get away from N-Large 2. Yes it has 52 grams of protein, but you need 4 scoops (and 152grams) to get that! Plus the stuff is so expensive you'll be spending over a hundred dollars on the stuff each month! Think about the serving sizes, 4 scoops pre and 4 post means 8 scoops per workout day, 4 workout days means 32 scoops a week. 32 scoops a week is an ungodly amount of protein. You can get weight gainers for much much cheaper and much better proportions and servings. Typically with a decent whey you can get a 35g serving with 25g of protein, weightgainers are a bit different because they have carbs and fats and maybe even some extra BCAAs (which N-Large has I believe) but thats besides the point, N-Large still blows.
My answer is a bit out of order becuase I was thinking of thing to add as I was writing, but the majority of your questions should be answered
