I heard your earlier versions in the Discord, and man this really came together nicely! the reduced length and combination of the themes really work for me! Really like the composition. Adding to the suggestion to get Cakewalk as a free daw (though I'm personally an FL Studio guy lol), if you need free orchestral VSTs, look into BBC Orchestra Discover and Spitfire Labs

I'm not entirely sure if you already use them, but in my experience, a simple way to make MuseScore sound quite a bit better without having to mess with DAWs is to install sound fonts for playback. Also, adding some panning can help a great deal in making the song feel less cluttered; especially for things like choir voicings, it helps a lot to just make them resemble an actual choir by putting them at different positions.

In the long term, I'd still recommend learning the basics of how to use a DAW, though, as MuseScore simply isn't meant for music production yet. Of course, that might change when they add this NotePerfomer thing, which I'm very excited about.