Preface: Don't ever accuse me of going easy on you.
Okay... all the proper nouns in chapter 1:
Tommy Travers
Amelia
Ben
Mephitis
Kaleb
Breached
the Warehouse
the Master
the Gifted
the World of Books
A Remembrance
Karina
Porter
Atria
the Tow
Original Intent
Virgo
Yashur
Genria <--- "cap"
Jostlin
Esthra
This averages a scant 200 words per noun... an average of 2.03 paragraphs per name.
I listed Genria as my name-cap. Once I hit this point in a story, I must reverse and jot them down (which I did) or else they become a carousel of name-index-cards.
Q1: Do you absolutely need all these characters right here right now? I mean Ben isn't even in the story yet. Why is he named? Are both Karin & Porter essential to attracting me to give you $10? That's the big question your chapter 1 must answer. If you stand back and eye it critically, you could get by with just one for now, and bring the other in when you have a chance.
Q2: I would suggest not starting with a sci-fi story (I know! I was the one asking for one in the previous two books). The problem is it's too late to the party and opens all sorts of questions (such as why doesn't Tommy bring a laser out of the book with him. If you lose an eye in one story, can you hop into this story and have it regrown? Why don't the villains use a sci-fi book to invent a weapon that can't be stopped with our technology?). Furthermore, you're eventually going to have to reassign Porter, Karin, Amelia, & M/C into new roles once they leave the book. Due to the size of the cast, that's going to be a jolt.
Wait a second. Star Trek tng started their episode 1 in a holodeck and forced us to reassign roles too. True... but they did it with 2 characters.
Q3: Special Note: I like the sci-fi scene and its presentation. Just knowing what I know about the series, I realize I'm in for a culture shock.
Q4: Can you make it more about Tommy than about what everyone thinks about Tommy. This is a little difficult to explain, but I will refer you to book 1 with his mother + brother dynamic. That was "living" Tommy or "pure" Tommy. What you have here is Tommy playing a role. A character playing a character. He's not being his true self. He's not being honest with himself or the reader.