Reply to Question to go go forward with my Kontrol S2

Hello everyone,
it's about 1 month that i've got a kontrol S2. I really want to create remix on-the-fly and not a simple mix between 2 song. So i want to learn to use sample deck. Where i can find free loops to start learning?
Any advice to start practicing with sample deck?
i need to upgrade my kontrol s2 with a kontrol F1 to create somithing more interesting?

Thanks all and sorry for my very bad english ( i'm italian )