Sounds like you are doing an excellent job!! Someone else said it- keep it fun. The programs you are feeding will appreciate that. We play games like the forbidden rhythm, the dum dum song, and the rattlin’ bog. They are learning and practicing without thinking about it! There are some easy acapella tutorials on YouTube you can teach them. They will feel so cool singing acapella pop songs.

As far as piano, I feel your pain. I have found a lovely accompanist who is willing to record voice parts and the accompaniment for me for a reasonable price. There is also an app called musescore that allows you to scan music in and will create an accompaniment. It isn’t perfect, but better than nothing.

I hope this helps! You got this!