Left some comments.
You need to give more detail to your characters and world so readers can care about what's happening. Even if the idea is you're going to develop them after they enter the digital world, I need a little than what you have so I can connect with something. By the time I got to the tutorial section, I completely checked out. Do you have a plan that requires six characters? Will they all be developed, or you plan on having most of them die over the story?
