Here is a quick handyman tip that may save you some time and aggravation when installing window blinds. Whether the blinds are vertical, faux wood, mini-blinds, or some other combination, they will all install similarly. You will need to install some brackets on either end of the window, and then install some supports in between the brackets on the top of the window.
Do yourself a favor, and don’t use the screws that come with the window blind. The screws that come with the blinds are small and have small threads with little bite. I prefer to use course thread drywall screws. The nice thing about drywall screws is that you can place them in a drill driver, place the tip of the screw through the bracket and at the drywall surface, and squeeze the trigger. The screw will effortlessly go into the wall and hold the bracket in place. The screws that come with the window blinds are too small for this and are not sharp enough to push into the surface. I would use either 1” or 1 ¼” screws with course threads. These will be long enough to reach the lumber behind the drywall and provide a movement-free installation.