I've only run one autox in my SS (ran several with my '15 Honda Fit prior to the SS), and still consider myself to be in 'autox kindergarten,' so flavor my comments with that for context:
Get there early and walk the track as many times as you can before they start. Walk with an experienced driver and ask them to share their strategy for the track setup.
Be mindful that your tire pressure will go up with each run as the tires heat up, so you may need to bleed air.
I did the "two-press" to turn off stability and traction control, but the nanny's will still step in to keep you from getting completely sideways if needed. The long-press turns *everything* off. It was recommended to me to leave some assistance in place the first time out with the SS, and I did feel 'My Little Helper' step in a couple times toward the end of a slalom section.
As stated above, don't bother with your time relative to anyone else's. If you can improve your own time from start to finish, you're learning! It's all about learning the car as well as yourself.
Find one of the faster cars and ask if you can ride with them (they're almost certain to say yes). Then, ask if they will ride with you and offer observations. Things happen so fast that you're brain will be well behind the car and the track the first few runs, and having someone else point out things you're doing wrong will be a huge help.
Finally, drive to the exit of the curve, not the apex, which will take care of itself if you're aiming at the right place.