Bring some snacks, or better yet supper, food concession can be hit and miss. Likely no food concessions at the track on wet days / nights.
Any vendors that come to the track typically only take cash. I usually bring at least $200, there can be deals to be had on tires, riding gear, parts etc.
Bikes run rain or shine, look at and be prepared for the weather forecast.
Friday track attacks are shared with the race club, "street riders" typically park in the 2 rows closest to the drag strip. This particular Friday coming up is not followed by a race weekend, so parking this Friday shouldn't be as much of an issue as it can be on a race weekend.
Ditto everything Brian and Shane said. Breathe, relax, repeat, it is just another street. This street doesn't go anywhere, and has no speed limit are the only differences. Well that and a distinct lack of 4 wheeled vehicles trying to run you over.
No one cares about, or will be impressed by, how fast you are as a new rider to the scene; the experienced people are noting your interaction with other riders on track and how smooth you are.
Riding gear: Full body coverage, no major tears / rips, fits correct. Full face helmet. 2 piece suits must fasten together. Portions of the track face the sunset, track attack goes to dusk, tinted visor helps.
Bike: no fluid drips (fork / shock seals dry?), tires good, brakes have adequate pad life and have firm control levers, any glass; tape up with masking tape or remove the glass. Enough gas is always a good thing, no pump gas at Castrol.
If possible bring a friend / helper / drive home / first aid contact. There is no safer place to ride, but riders who believe there are no hazards are nieve. Many find a track day draining of energy, if you ride to the track alone watch your energy level, could be a tired trip home.
If you need help unloading your bike, or anything else, just ask; I have found everyone there likes helping fellow riders.
These people also have track days at Castrol:
https://www.hardnoxtrackdayz.com/