The first thing I'd say is think out clearly your organization first. I.e. What's best for your workflow? You may want to organize around themes, or you may want to organize around particular figures.

Here's my set, for example:

Antonia
Believable3D (for keeping my personal characters and materials easy to find)
Children
G2
Gen3 (for all the Generation 3 DAZ figures)
M4
Miki2
Minor Figures
V4
Hair-Hats
Props-Animals
Scenes-Furnishings

Maybe a bit of overkill, and of course it depends on what content you own.

Once you've settled that, unzip/install all your content to the relevant runtime containing folders.

Then, you add in Poser. Personally, I added my by manually editing the file. But you can add libraries from within the PP2010 library.

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Hardware: AMD Ryzen 9 3900X/MSI MAG570 Tomahawk X570/Zotac Geforce GTX 1650 Super 4GB/32GB OLOy RAM

Software: Windows 10 Professional/Poser Pro 11/Photoshop/Postworkshop 3