Ideally, you want mid 60F and 60% rh... a few degrees or a few percent rh not making too much of a difference. At this temp and RH, even trimming and individual buds on a mesh rack will take 10-14 days.
You want 10-14 days. Do your best given the context.
Based on what you describe, i'd start by hanging entire plants. The less you cut off, the slower it'll dry. Unless it's cold AF, it's almost certainly a fast drying environment.
In addition to control temp and RH, cutting down to branches, cutting down to bud-sized, and wet or dry trim all impact rate of drying. Think of them as tools to mitigate less-than-ideal drying environment as best you can. Should be obvious which slow and hasten dry times. Circulation fans are fine, but don't point them directly at drying flower. You don't need much. I don't use a fan. i let my humidifier move the air.. it's a hefyt fan, though. I grow in the winter, so it's 30% RH ambient. It runs often.
Buy a humidifier. They are cheap to buy and cheap to run. Don't buy the 'atomizer' type. Those leave a residue on surfaces. Evaporative humidifiers unfortunately use a wick. 2-weeks at a time will last many grows.
Pick a small room to control the temp and rh as best you can. 15% RH is a desert.
I rarely suggest it, but use a tent or enclosed space, especially if you don't buy a humidifier. Vent it to control resting RH. Inside a small room will still help. Still want some circulation so you don't grow mold. Don't completely seal it up. Vent at top. This may work for 3-5 days? Measure RH in a more congested area of the plant as best you can. Know the 'worst-case' scenario. and avoid anything 65%.
boveda 2-way humidity control when you get to jars or however you store them. 58-62%. They give size to flower mass suggestions.