Keep trying, seems harsh to dismiss you without some more coaching. Will they let you take it again for free or a reduced price? Maybe try a different bike, which might have a clutch adjusted differently. If you have never driven a manual transmission car I can see how it could be daunting. At least in a car you don’t have to worry about falling over, just stalling. I think the suggestion of getting some practice operating a clutch in a car is a good idea, to get used to the friction point without worrying about falling over.