I did my m2exit with humber at the start of this month.
The class seems to attract the "oh no my m2 is about to expire" kind of crowd, of which most have very little experience with their actual bike.
I was deemed best in my class by far, and I am no track rider lolol.
The course isn't so much about skill, rather it is about technicalities that keep you legal (eg/ blind spot checks, road side stops, etc).
The course is made so that people in your situation can pass the m2 exit confidently.
Most of my class was Harley riders, older Harley riders. Most were not so good and really didn't know anything about their bikes. They were the types that were scared to lean, go on the highway, slow manuevers, etc.
Bottom line, everyone in my class got their M. And trust me when I say there were some terrible riders.... Terrible at least to someone who is in love with motorcycling and technique etc.
You WILL pass, just relax and have fun!