Black Box Testing Plan -Xcode project-

I have a simple Xcode tab application, and I have to apply a testing strategy on it and deliver a report to the teacher.

The application consists of tabs: user account, category and favorite. There are two different kinds of users. The one who creates the account and his information will go to the category views. And the other one who's looking for people's information in the category views and can favorites the information(which will look like cards).

I did choose the black box testing strategy to apply to the project. Now I'm doing the testing plan. But I don't know what should I cover in the testing plan!!

1-Introduction. including the objectives and what I have to cover when testing the project.

2-Test Procedure.

Is that enough?

All of examples for testing plan I found are pretty complex and suited large projects in large companies!

So, is there anybody here who have experienced black box testing strategy before, and tell me what should I exactly cover in a simple test plan?