This is a really well composed song! I think one way to really step it up would be to use a more realistic guitar. This free one has been my favorite for a while:
https://unreal-instruments.wixsite.com/unreal-instruments/standard-guitar
Lately I've been pairing it together with this amp, especially since it has a great tone right off the bat.
https://ml-sound-lab.com/collections/amp-sims/products/amped-roots
It's mainly meant for metal music, but I think it sounds fine in rock songs too.