I have several times over the years, there actually a relative of the myna bird and from my experience they pick up speaking fairly easily way faster then any parrot I’ve ever had, the only bird that did so easier was the crow I raised, in both cases I did start with them before their eyes opened so that might make a difference

They also learned trick and things very easily recognized patterns and learned to take advantage of them

I trapped Starlings for bait birds for banding Hawks. I fed them 26% turkey starter and give them LOTS of water. They love water.

What did you feed them and how often? We have been feeding supper worms
Large meal worm looking things. I pinch the heads off sho they dont bit on the way down.( dont absent mindedly rub your eyes after this, apparently the bug juice im my eye im allergic to.) She also is feeding some softened cat food, and I collected some pill bugs as well today. I feed about everything 3 hours . 2 supper worms at a time severalntimes and 5 pill bugs once.
Sounds like this will be an interesting and fun project