Yes, there are instructions at the box. To hide seams you will need to use caulking and paint.

how do you install?

Hello,

they come with two-sided adhesive patches. Also you may use glue, like Power Grab All Purpose. Installation instructions are available at the box.

To hide seams, you will need to use caulking.

Thank you

My wall is 34.5 sq.ft. and lightly textured. Will the texture need to be sanded off prior to application? Also, what is the process for cutting the tiles?

You would need 4 boxes to cover that wall.

And yes, the surface has to be completely flat.

In the listing, at the 3rd picture you may see the tool, which you would need to cut the panels.