Cannot upgrade software, cannot install watch faces, cannot sign-up for Beta

Brand new gen 2 epix pro. 3 issues:

(1) Can't seem to upgrade past software version 12.75. I've been checking for an update for nearly a week now since I got the watch.

(2) I can't install any watch faces as it says I need to upgrade my watch through Garmin Express. Note: I don't have a Mac or PC, only the Garmin Connect app on my Android phone sync'd to the device, which I imagine should work for this purpose.

(3) On the online Connect site under my device there is no device settings where I can sign-up for the beta software. 

Hoping someone can help, kind of frustrated. Thanks!