GarageBand won't open and can't access files from file sharing tab on PC

Where to begin... I just found my old Ipad 2 gifted to me from years ago that I used a lot to make garageband projects. I couldn't open garageband on it. I wanted to see if I can access any of my projects from it through my PC, but it's the only app that has no files from the files sharing tab on my Itunes account. Nothing was deleted the last time I used it years ago. The account that is linked to the downloading of the garageband belongs to a family friend we have no contact with anymore. Is there any way I can back up any files from garageband onto my own personal icloud account that I added onto the device or PC? If I reset the garageband in the settings will all those projects be deleted? The version of the garageband still on the Ipad is version 2.0.1 (although on the App Store it says 2.3.15) and the version on the Ipad itself is version 9.3.5.

tl;dr: Garageband won't open, can't access files from filesharing tab on PC. Account linked to Garageband inaccessible. Everything out of date by maybe 10+ years

[Re-Titled by Moderator]