Want to create the ability for admin user to be able to upload new content

[muneer]

See my response as follows:

Is there a way for an admin to change stuff, like links, backgrounds, etc, while using my app?

Welcome to Thunkable. You need to store all the information that you want to control in a kind of table such as Firebase or Google sheet or Airtable. Build screen(s) for the teachers (admins) to change the values of these tables. When your app starts, it should use a kind of welcome screen or splash screen to use the time to read the values from the database and update the screens as necessary.

Is there a way for an admin to change stuff, like links, backgrounds, etc, while using my app?

Use the same suggestion I posted earlier but note one thing. Firebase has multitude of services but Thunkable directly accessing two services only Sign In Realtime DB Firebase has storage which you can upload files and images but you will have to do it with your own (Thunkable does not provide access to Firebase storage). So you will need to upload the images to Cloudinary and save the URL to the image in the Realtime DB.