Live does not work in sheet music, and as a pianist, sheet music is simply how I think.
I had my years of pianism as well, but really : it doesn't take long to get used to matrix input. I still do some things on score, but I don't bother with notation-input any more. Sometimes I still do stuff on paper and transcribe it in. So that's my sincere and educated advice.
If you really want nice notational,
you can get it, but it adds very significant overhead if you want to get the stuff sounding good at the end, and I would
strongly[/il recommend against using that stuff for electronic works (i.e., unless someone's going to be printing the stuff out and playing it).
and finding and configuring VSTs seems like a monumental task to someone like me, with no experience in the field
Once you learn, it's not too bad. But be prepared to pay or pirate to get any good instruments.
[ FWIW, I use
reason. I don't know how fully-featured the demo is, though. It doesn't have score-notation. It has a lot of built-in instruments and sounds. One of the best experiences I had with it initially was in improvising into it from an electric piano, going through all of the preset instrument banks. ]