Nope, I got lucky and was able to very carefully drill it freehand. I did the initial center punch, then series of increasing drill bits.
You should be good with the Jim's kit.

If you've never used a tap before, maybe better to practice on spare pieces of metal. Even get a bar of aluminum, put a steel bolt in it, cut that bolt flush, and practice getting that out.
You only get one shot at your cylinder head. If you mess it up, then either you upstage the repair with a Helicoil, or you have to remove the engine and bring it to machine shop.

This project got me sweating as well. The stakes are high...