Your fiance? Where did you pick this guy up? I mean, I know one of the founders of TechPB married in paintball gear and had a game right after in her dress and the groom in his tux, but Beyblade? I'm lost... I'm glad this is so popular I guess, but I'm just a little flabbergasted, if I'm allowed to use that word...
Enough jokes: You seriously want to look into the BeyWiki articles, they're a great start but make sure you're looking at the MFB section. After that the site has a thread that lets others help you with what to buy; parts you should have, parts you don't need, whether the Beylauncher is worth getting, what stadiums are decent. All sorts of help is available on this site. Don't be afraid to post, but make sure you're in the right forum, and use the 'Search' option just as aggressively, it is your best friend.
[EDIT] If you need some help getting around the site at first, don't be afraid to ask for help, no one penalizes around here for questions.
Don't double post either, the 'edit' button is there to be used.
Hey, you live near
Kitchener/Waterloo Ontario? then why haven't you posted
here!? Well? Get to it, chap!