Check our point charts to figure out how many points you will need-it will vary by time of June and day of week. The earliest you can book is 12 months, not 12-I think you’ll probably be ok most times of year any time before 7 months shut at 7 months and later total gamble.
https://www.wdwinfo.com/disney-vacation-club/VGC-Points.htm
https://www.wdwinfo.com/disney-vacation-club/VGC-Points.htm