as phil says when I did cadwell I was shitting incase I binned it but it turned out I was overthinking it! And wear a orange bib for the newbies don't feel stupid about it as you will need it! if people know its your first time they will give you space and be more cautious around you take your time get used to it and have fun just remember there is always someone slower than you and dont be tempted to get out last thinking it will be better either. If you can get out first all the fast guys will pass you all the slow ones will be behind you and you will have at least a few laps with no one near you