Love the blue btw! I took mine to a moto meet this week.. still debating if I want to take her on track or stunt... maybe it's time for me.to save for a bike I can drop a few times lol
"Open track days" are often sponsored by a club or mfr, and usually have a 'training program'. Around here, it is called RDS (Rider Development School), and costs $100 in addition to normal track day fees. They do a couple of slow track laps, then some sit down class, then a little faster, then classroom, rinse and repeat skip the conditioner. It is well worth the money.
At the end of the day, you will be very comfortable taking your bike to >80% of it's limits or higher. These 400's are pretty competent as sold, so 80% of their limits is WAY FASTER than they should be operated on public streets.
My first RDS event was on a 570lb Kawasaki Versys 1000, which is basically a big touring bike that cost almost triple what the 400's do with about triple the HP. I was worried about wrecking the bike, but that faded quickly. I had a blast. Fun Fun Fun. You'll love it.