Opened the NBA Card in 23 years!

Depending on the condition of your cards, your Kobe Bryants will be worth quite a lot.
 
Welcome to the site and back to the hobby?

First thing I would do is possibly get some new storage devices - one touch magnetic holders or toploaders, whatever you prefer, those old screw downs have a bad rep and history of damaging card edges and corners.

Also possibly check out the condition of the old penny sleeves, get some new ones of those so they aren't sticking to cards in the pages.

Good luck!