For changing icons, to make it easier for your self try using LiteIcon app, it's free.
I also use an app called Candybar for icon management purposes and applying png icons (candybar makes it easier to apply it). Candybar no longer developed nor supported so don't try to use any other features if you decide to use it.
Bartender for managing(hiding/sorting) menubar icons.
I also use an app called Candybar for icon management purposes and applying png icons (candybar makes it easier to apply it). Candybar no longer developed nor supported so don't try to use any other features if you decide to use it.
Bartender for managing(hiding/sorting) menubar icons.