eNotes prevents writers from actually finishing student assignments, but I can offer some guidance based on the initial story that you have set up. John is on summer vacation, so he has time to do a significant amount of investigating. The exposition has introduced your readers to John and his conflict. He wants to find Steve and offer some kind of help, but he is not sure how to accomplish this task. The other conflict that has been introduced to readers is the conflict that exists for Steve. He is dealing with a family and home life that is falling apart around him. He is being abused at home and no longer feels emotionally loved and cared for.
Your "Day 1" ends with John having gotten a little bit of information about where Steve went after the house where his journal was found. Day 2 needs to have John taking the next step to find Steve. You need to make a decision about where Day 1's info is going to lead John. Is Steve's new address across town or significantly far away? My recommendation is to make Steve be far away. This will force additional conflict on John. He will have to figure out how to travel these great distances and perhaps even get permission from his own family. Maybe finding Steve and helping him is so important that John decides to run away with one of his friends to find Steve. Have Day 2 wrestle with these issues. John should make the decision by noon, and then the second half of the day can be John and his friend obtaining the necessary supplies, money, etc. that they need to make their weeklong trip.