"...I’m lost on what exactly I need to rank to succeed and not get laid off should that time come."
Chevron has long been a 'strive for mediocrity' company. If you're not a high-p-t (they all know who they are), you'll never get that 'rank to succeed', so don't worry about that. Instead, lower your expectations, be happy with that '2', don't make any waves, nod in agreement at whatever your manager says, quietly take all the HR mandatory training, don't volunteer for anything unless your manager is there also, and come up with whatever answers your boss wants to hear. That's the secret formula for all the non-high-pots who make it 20+ years with Chevron. If you don't believe me, just look around.