This app was mentioned in 2 comments, with an average of 1.50 upvotes
Here's an app a friend and I recently made that teaches you how to write the alphabet https://play.google.com/store/apps/details?id=com.jernung.writeit.tha
Still testing it, but let me know what you think
You can also check out this app I just released for writing & reading Thai: https://play.google.com/store/apps/details?id=com.jernung.writeit.tha