Idle.
It's gonna be quite awhile before you're comfortable really leaving hard. That's okay! Just take your time and work it up, what a pro launches at and what someone else launches at has a couple variables...
Body postion
Throttle position
Body weight/distrubution (height, and such)
Traction
Experience
Just remember, the goal is to get the gas open to WOT as soon as you can. Lean forwards, get your weight towards the front wheel, and gas it like you mean it. It's easier to give it lots of gas at a fairly low rpm, despite what you may hear guys bullshitting around about.
Remember that Rickey G was launching Brock's ZX14 at like 2krpm.....