Important PSA for Battlegrounds: Do not start matches until season officially starts
BGs seem to have popped back to life an hour early, probably because of daylight savings, but season timer is still ticking and everyone's progress still seems to be on the board. I've heard some people say they can start matches and other people say they got errors, but I would strongly recommend staying away until the season starts properly. My guess is that *all* progress will be wiped out when the season timer concludes, which means anything you manage to do before then will not be preserved.
Typing quickly just in case this might help someone, although this is later than I would have liked (sorry, asleep and only just noticed and reported it).