Just do what you are comfortable with relative to kit or not. I never bought a kit for my first guitar. Spent the first month learning to sharpen tools correctly! I had a plane, but it was so dull it wouldn't cut anything. Never even thought about sharpening it
! Sharp tools are your friend when guitar building. You don't need a lot, or new ones, but a few good sharp chisels and a sharp plane or two are pretty necessary.