Beginner basics again
Probably not much I can add here that hasn't already been said or common sense would tell you. The full size plans arrive folded, which takes a bit of time and patience to lay out on your ply to mark -out around.
I have used a plain old jigsaw with a fine tooth blade.
Take your time, I got a sore back after only cutting two pieces--but I'm old and unfit.
Good luck with yours.