Hello,
This might help to start with.
Here are a couple of piano teachers we found on YouTube, using iReal Pro; you should find others with a search.
https://www.youtube.com/watch?v=HtN__auMp7M
https://bradleysowash.com/blog


You can create your own simple songs with the chords or scales you need to learn. Once you know how to create/edit a song, you can easily make up your own practice material to help you learn.
You will find how to create a new song and enter chords in the User guide (in Settings (or older versions of iReal Pro, in the More window)).