do i just email them?
im confused

Just call the phone number on the site and set it up. You will have to give them a credit card and they will put a hold on it for the cost of the flute. You also have to pay for shipping. They have a 10 day trial period. They will walk you through it. It is easy.

<Added>

It is listed with all the info right on the site.
http://www.fluteworld.com/index.php?action=strona&wart=20

beware that trials are available only for US residents (and maybe also Canadians), not for Europe or other places.