How to get the sound of the score to a next level...?

I'm pretty content about what musescore's capable off.
But I'm looking for a way to lift it up a little.
I have two ideas about that:

1) I'd like to know if it's possible to use a library such as in Kontakt to play the recordings in that library live in
musescore and make a mix and export that to a wav-file. How would I do that?

2) Maybe there are other ways that people use and would recommand.
What I'd like to do then is; make the complete composition/arrangement in Musescore and use it's
midi file in a different program to link certain libraries to certain instruments and be able to mix and
export all that to a wav-file.

I don't have any experience in that yet and I just tried some things in both reaper and ableton live.
I managed to at least get some "midi information" into the programs, but I can't get any sound from it.

Does anyone has set up a nice working environment like the one I need? And what would you recommand to do? There are thousands of youtube videos...but not one that provides the information I'm looking for.

Thanks in advance!