Cut a hole in the insulation wherever there is electrical wiring.
How to insulate a single story attic.
There are two ways to insulate triangular attics behind kneewalls.
To build a catwalk you would usually elevate a section of the framing perhaps with 2x6s installed at 90 degrees to the joists and you would install osb or plywood on top of the elevated framing.
Lay the batts across the ceiling joists covering the existing insulation.
Lay a two by four on top temporarily compressing the insulation to a manageable.
If you need regular access to your attic it makes sense to build a catwalk before you insulate the floor of your attic.
While wearing dust mask and gloves carry r 38 batts of unfaced fiberglass insulation into the attic.
The traditional approach is to insulate the kneewall and the attic floor behind the kneewall.
A better approach is to insulate the roof slope above the attic.
This method can be made to work but the necessary air sealing details are demanding and fussy.