Theres a whole load of us who do regular trackdays at Snetterton in Caterhams, you are always welcome to tag along. 1st day, and less than 100 miles on the ar ? Id be checking the service and warranty requirements with bookatrack first. Id be wanting at least an oil change before taking that on circuit. In a 620 you wont need an aeroscreen for now, that`ll have more than enough power. Garage is useful especially if its wet, means you can store all your gear too. do your belts up tight, especially the lap belts and add some tywraps or elastic bands to stop the ends of the belts flapping in your face Sit in the car, belts on, helmet on, engine off and just relax and clear your head for a couple of minutes (This is good before each session I find) Get at the front of the queue for the sighting laps Get some instruction early too build up slowly, take lots of breaks and only do 10-15 minute sessions. I always take it steady for a couple of laps too, just to get some heat into the tyres and let everything come up to temperature gradually before getting quicker. Always do a cooldown lap as well before coming in, it is much kinder to the car, and allows you to wind down too. High gear, low load, fans and heater blower on etc and swift pace rather than pressing on. Just relax, and most of all enjoy it !!!