> mi sona pona sina!
Difficult to parse.
Assuming you mean my idea is good, here are a few ways I might have said that:
mi pilin e ni: sona sina li pona!
sona sina li pona tawa mi!
(I also realize it could also be pilin for thinking/feeling, but sona seems right for the object of knowing to me...)
I think the problem is trying to force English word order onto tp vocabulary. I stumbled all over this early on, so I'm empathetic.
That said, let's make some music!