fact of the day!!
it doesnt matter how long youve known a person
if you try hard enough you can get their preferred pronouns and name memorized pretty easily!!
it should not be taking you 8 months.
if you put an effort into it, you can get it down in at least two weeks.
and yes its okay to slip up a few times during that time period and even later. but it shouldn't take you very long to get it nailed into your brain that a person doesn't use their deadname anymore.
stop making up excuses