not exactly - and that's true whether you buy direct or resale.
"use year" tells you 1) when your pts are valid for a stay and 2) when your banking window closes (currently 8 months after your use year begins.)
home resort currently means you have booking access at 11 months out. (it also determines your annual dues rate and tells you when your contract expires.)
but if you own at AKV (for example) and other AKV owners book all of the concierge villas before you call at 11 am on the morning your 11 month window opens...you would be out of luck.
owning at a home resort does not guarantee you a room...it just means you have access before non-home resort owners. (which will remain at least 1 month ahead by contract...currently, it is 4 months ahead.)
edited to add: it usually works out that you can book what you want if you call at 11 months out...but just clarifying that it is not a "lock."