It might be massive, and a really tough challenge, so don't try to take it all in at once, start slow and ease your way into it. Once you have found a really good spot, stay there for awhile, get comfortable, and work at it there until you've loosened up a bit and feel more fluid with your experience. And don't worry about finishing, we can make new characters, so you can always start again, and each time, it will get easier and easier. Before you know it, despite the size, you will be able to jump right in and get going pretty fast. Each time with someone new and exciting. A soft-spoken hunter, a mysterious warlock with magic hands, a titan brute, you can try them all and have tons of fun with them. Don't forget co-op either; it's always more fun to go at something so big when you get friends involved.