Classical?
I think you might get away with baroque pop.
There're some aggressive transients in your vocal that are counter to the intent of a lullaby - you should address those - it'll make a big difference.
There're quite a few clicks n clacks besides the expected string noise of a mic'd classical.
If you're using Reaper you can use ReaFir to fingerprint those things and remove them without to much aliasing.
Some nice touches in the arrangement.
Like many lullabys there's a spooky element in the narrative.

Cheers
rayc
"What's so funny about peace, love & understanding?" - N.Lowe