It's extremely simple. I just put the harvested herbs loose in the paper bags, staple the tops closed to keep out dust, and hang them by the handles close to the ceiling on cup hooks, etc. I write the contents close to the bottom of the bag so it's easier to see.
Since heat rises, it's warmer near the ceiling.
I don't have a basement but it seems to me that there would be higher humidity down there? I would dry my herbs in the attic if I had one.
After they are dry, I crumble them up by flattening the bag, then remove the stems and/or pour out the crumbled herbs to store in jars and/or zip bags. With tea herbs, this would be when I blend them. Sometimes (often!
) I'm not so organized and just take down the bags and grab a handful of whatever herb I'm looking for at the moment.
For smaller quantities, I've also put sprigs in brown paper lunch bag or slightly larger bags with tops rolled down and labeled, then put the bags in a larger paper shopping bag -- typically wide squat ones from the bakery, sized to hold cake and pie boxes flat -- and put the bag on top of a high shelf or hung from the ceiling.
These herbs should not have any water on them when you put them in the bags, obviously, or they might spoil or get moldy.