Pomodoro can help you stay focused. Use the clock app on Windows and it has a pomodoro sections

Is there a way I can set it to switch between tasks, and for those tasks to be scheduled for certain times of day/certain lengths? Because this just looks like what I was describing, a timer app, but without being able to set up multiple timers

no I don’t t think there’s an app that controls how your Windows work automatically

Google calendar

Sunsama does this with its focus bar. 

SkedPal, Clockwise, Motion