Things your Spanish teacher didn't tell you
A friend of mine (a native Spanish speaker) just started teaching one of his friends Spanish, and the first thing I said was:
Explain to her that ser is essence/identity/characteristic and estar is status, and that’ll go SO much better than the “ser is permanent and estar is temporary” that makes us try to say “es muerto” and “estoy bautista” (because hey, conversion exists). Like, death is pretty permanent, but it’s still a status.