Don't expect to get a BWV standard view studio. An owner can reserve at his home resort beginning at 8 a.m. eastern, 11-months out from date of arrival. BWV standard view studios usually disappear daily throughout the year for any given start date within moments after 8 a.m. eastern at 11-months out. The winners are simply those whose computers communicate faster with Disney's right at 8 a.m. than the many others who fail. Even finding a member or a rental agency to try for BWV standard view studios can be difficult -- the owner would typically have to try exactly at 8 a.m. 11-months -out and then likely have to waitlist and then check constantly after 11-months out hoping to grab something that opens due to cancellations, and success may never happen, and finding a member who wants to do that for a rental can be difficult.
Note that the same problem exists for AKV value and club level studios. BLT standard view studios can also have the 11-month-out issue at times.
If you want BWV, your best chance for a studio is pool/garden view. Boardwalk view may be a possibility in May but those also usually do not last too long past 11-months-out for that time of year. First half of May, because it is in the second lowest point season of the year, can book full faster than March or April or second half of May (although second half of May can also have issues). Lowest point cost rooms at any near-park
DVC resort generally book full faster than others, and that includes not just studios but the 2BRs for any lock-off 2BR (which can be reserved separately as studio and 1BR, and thus studio reservations automatically fill any given 2BR lock-off). If you want a studio at an MK or Epcot resort, your best chance will be for Poly, BLT lake view, a VGF Resort Studio, or Riviera preferred view. BCV is a possibility for early May if actually using the 11-month window. CCV studios can be difficult because those can also at times disappear at exactly 11-months-out; BRV is a possibility. Generally easy to get, even at 7 months out, in early May, are SSR, OKW, AKV Kidani and Jambo savanna view.