Hey, I saw your post.
These forums might help.
https://www.wattpad.com/forums/vanilla/discussion/1153650/find-an-editor-refresh-due-27-01-17
https://www.wattpad.com/forums/vanilla/discussion/1145946/find-a-beta-reader-here-refresh-due:-1st-december2016
I did read the first part of your story. It's hard to judge based off of one chapter. What I can comment on is your dialogue. I'll give you a few examples of the mistakes and tips to accompany it.
"Remember it's not real." he whispers, perhaps a little nervously.
If you're using 'he/she says or <- other replacements such as 'asks' etc, there should be a comma instead of a full-stop.
"Remember it's not real," he whispers, perhaps a little nervously.
If you are continuing on the dialogue, a comma is placed at the end before the fresh dialogue and there is no capital letter for the continuation dialogue.
e.g "Remember it's not real," he whispers, perhaps a little nervously, "please don't forget that."
Use a full-stop when it's not a continuation but a new sentence.
E.g "Remember it's not real," he whispers, perhaps a little nervously. "Let's get started."
If there is an action after the dialogue you use a full-stop rather than a comma.
"Remember it's not real." He picks up the script.
But it's better to construct the sentence with the action first in this case.
-> He picks up the script. "Remember it's not real."
Grammar wise, I can help you out. Just let me know. Your plot sounds really interesting. Happy writing!