procedure is:
choke on, ignition ON (ON)
flip til it starts and stops or burps
choke off
flip til start

If you do not start at first with ignition on, you will never know when the engine gets fuel, and it is easy to flood your engine if the idle needle is set rich.
basic idle needle setting: find best idle rpm by adjusting the idle needle. Then open up the needle 1/4 turn.
after any idle needle adjustment, the high needle must be adjusted as well.

The champion DJ7J is not good, you need a resistor type plug like NGK BMR6F