Getting started with a crown graphic...
Welcome to the FPP.
You didn't pick a very good time to start with 4x5 polaroid. Fuji has discontinued all instant 4x5, and is now only producing the smaller version (type 100) in color. You know what happend too Polaroid :) So, the only place to find 4x5 instant film is online, or maybe locally.
Hopefuly new55 will produce a new type 55 film, in the near future. And that's at the moment the only hope on new 4x5 instant film.
A local (Netherlands) photo store did sell some slightly expired FP-100C45. I do not know if they have any left, but I could ask if you want ?
True, Fujifilm has ceased production of instant 4x5, but the regular size pack film lives on. If you can find a Polaroid 405 back on ebay or elsewhere you can still shoot instant film with the crown. I use this combo a lot and love it. It ain't 4x5 but you still can get great results.