unless it's an exceptionally hairy strain, you have quite a bit of time left. it is not imminent.
plump underneath will occur.. then some days to ripen beyond that. When they look like nugs, 7-14 days.
Forgot to mention -- Focus on the trichomes on bracts / calyxes.. not on leaves.
the ones at the top are often rip before below. I like to scope a zone (depth) of buds and consider the average.