It’s never too early to panic. Most practitioners recommend freaking out when your favorite team’s record is 0-0, so if you’re nervous after watching the A’s Monday and Tuesday night then you’re doing just fine.
The panic itself, however, is not warranted as there is a pretty simple explanation for why Oakland looked like they weren’t ready for prime time pitching or hitting. You have been hearing for a while about the “3 week summer camp” that will ramp teams up to the abbreviated 2020 season. The idea was for it to be short enough to get a season going, but just long enough to get teams “game ready”.