I can not find any social chest for the life of me how do I get them fast?

Make sure that you are in online mode, the wifi symbol in the bottom left of the game screen under the minimap should be all white, not grey. Then teleport around all these locations until you find one, should find one after a while

https://www.youtube.com/playlist?list=PLnvJ6_47HHygXy4KCgtU6tgJCci9rFkoj

just tested this myself and it does work, you may also need to have these settings turned on in options > online

https://gyazo.com/d7769d0fb4a138d0da99487efe0211c3

community challenges arent apart of 100% completion

database 100%? is their even a community challenge that gives you database entries?