Ah, Photoshop. That one is most certainly a toughy. Most people just suggest GIMP, and while it may have the features, it certainly doesn’t have the ‘flow’ Photoshop seems to.
I’ve got a couple of small personal projects currently being planned and I’ll be (attempting)to use https://krita.org/en/ for the graphical work and https://www.blackmagicdesign.com/uk/products/davinciresolve for the video / audio parts.
You may or may not have already tried these alternatives. Best of luck to you! :)