Most reference libraries start the same way. There is a folder called Inspiration, then one called Inspiration 2, and a few months later nobody, including the person who made them, can find anything in either.
I have built a few of those myself. What finally worked was not a cleverer folder structure. It was a handful of simple rules, applied a little at a time.
This is what I would tell someone starting today, in whatever app they use. Where Hive helps, I say so.
Keep the Source With the Image
The first rule comes before any organizing. When you save something, keep the page it came from, and a line about why you kept it.
A reference without its source is hard to use later. You cannot check who made it, find the rest of the series, or see what was next to it on the page. A screenshot loses all of that in one step.
In Hive, saving from the share sheet or the Safari extension stores the link with the image, and you can add the line in the same step. If you are in a hurry, the link alone is already most of the value.
Sort Later, Not Never
Most people try to file each reference the moment they save it. The habit rarely lasts, because at that moment you do not yet know what the reference is for.
It works better to save quickly and sort on a schedule. Once a week, open what came in, star the few worth keeping, add a tag or two, and delete the rest. On an iPad this takes a few minutes.
In Hive, Auto Save keeps saving fast. Items without a folder or a tag are easy to find again, so nothing is lost by waiting.
Stars and Notes Do the Choosing
A library grows faster than anyone can review it. Stars mark the few that matter, and notes remember why.
A note does not need to be long. "The way the light falls on the left wall" is enough. Six months later, that line is the difference between a picture and a reference.
Let Rules Gather the Working Set
When a project starts, you need a small set, not the whole archive. Instead of copying images into a new folder, describe the set: everything tagged warm tungsten and starred, or everything from the last two months in the Hotel folder.
Hive calls these Smart Folders. They fill themselves from the rules you give them, so a new reference that matches appears without any filing. Full Smart Folders are part of Pro.
Keep the Library Somewhere Lasting
The library should outlive the app you use today. A Hive library is a folder in a place you choose, such as iCloud Drive or the device itself. Copying that folder is a complete backup, and Eagle can open it as a library too.
None of this has to be in place on the first day. Start with a folder for each project and a few tags, keep the source, and sort once a week. The structure grows out of the work.