I'll just warn you that if you use Apple's keychain, you are vulnerable to all of the various zero-click zero-day nonsense that's been in the news. Like, obv you're unlikely to be specifically targeted but when you use Apple stock stuff, you're vulnerable to all that. Its becoming more likely that this is intentional as a backdoor to all the other protections that get touted.
Orher password managers allow for the possibillity of keyfiles and 2FA so I would reevaluate if you can. You are not "safe" and at some point one of these hacks are going to hit mainstream à la Lastpass and I just want to make sure you're pre-warned.
At the very least, get your ass on Lockdown mode since it invalidates these attacks, for the most part and as far as we know. Also disable iMessage and Facetime if possible