You will get some of each flavour the first week - you can try them all and then exchange what you don't like at your first pop in......its near impossible for us to say what is best - because what one person swears is the best flavour of all, the next will come around and tell you it's the most disgusting one. It really is such a personal choice - sampling them all really is the only way to go.
Personally, I like al the flavours equally really- caramel being the least favourite - but is not horrible or anything.
Good luck to you! and its great you are excited!! It is an exciting adventure you are embarking on!!
x