There is a phone menu in our game and through the "Tasks" button you can check what steps you have to perform to complete each route. It will be updated in the future to be even more intuitive.
So, yeah, progression is streamlined and you have to do to proceed is to follow what the task says. (On PC you can also press "C", go back to the character menu and choose the one you want to pursue, and if done right - every time you click on C it will open up their page with tasks already displayed there. Basically a shortcut).