My advice, STAY AWAY FROM THE JIGS! If God wanted you to use jigs, your fingertips would be allen wrenches...
Seriously, practice on small, hollow grinds using a push stick and moderate belt speeds until you can make a hollow grind that stops and starts where you want it. I'd suggest a blade width of about 1-1 1/4", and a length of 3-4", with a smooth, curved edge (drop point). Grind edge up, and, scribe your desired grind lines onto the steel. Use 01 steel, 'cause it grinds easy and is inexpensive.
Practice, Practice, Practice.
RJ Martin