I enter main and pet
i often leave at 3-4 AM to bus into london, then catch the early trains out to get to shows, and often narrowly miss the 9pm benching times.
the main class hamsters are not disturbed in any way other then by the judge and stewards, so they have an easy time and sleep most of it.
pet class you are allowed to handle your hamster (most shows) up untill judging, then after
it can be nice, and its lovely to meet friends hamsters, but some do get iritable (my hush puppy is NOT a happy bunny if too many people touch her, she's mummys baby)
If you have read up and know everything you need to know, choose a colour
the best start colours would be cinnamon, golden or cream, as they have long show lives, and can branch to other colours.
I do warn you, its not fun and games. Its heartbreaking, stressful, brings you to tears and smiling with joy. think very carefully before doing it.
I would recomend going to a show or two, talk to breeders, look at the main class, see what the hamsters score, get used to what the colours should look like, then pick something you feel is right on the sales table
i tend to go for those who pull the heart strings then the best looker tho XD