P: help with setting up Collections for all my digital family photos

I have just under 100,000 family photos (divided into different folders - family member's name) on an external hard drive. With all the photos I have collected, it is difficult to organize and to find pictures.  Plus it takes extreme lengths of time sorting through the photos.

I want to import all photos into Lightroom Classic on my Windows 10 64bit computer.  I need help designing a foundation that works with Lightroom and for me.  Ultimately, I guess I want a Collection/Smart Collection for each family member so I can find particular photos, and be able to continue to add new photos in the future.

I have 25 different family member (each has their own folder on the external hard drive).  I do have some videos in some of the family member's folders.

Any other suggestions that I might need to add to setting up my Lightroom are greatly appreciated.

Thank you in advance for your help in my request.