Yea every strain will have weeks apart
from finishing. Takes practice on every strain to figure out when its ready but all plants do swell up last few weeks doesn't mean you get more.
Doors as in how you enter the room ? Just use a regular door just line the inside with sticky foam strips or any or door jams that seal the bottem you ca. Usually buy them in long strips simple effective and cheap
Maybe few weeks ...your foliage is still nice n green meaning she still growing strong. 60 days is just a rough estimate hairs are still white but turning orange usually when there 80% orange n your foliage starts to turn yellow getting close to harvest