Estar is generally used with location and state of being(health, emotions, clean, dirty, dry, alive, deceased, married, divorced, pregnant, etc.) A rhyme to help is : For how you feel and where you are, always use the verb estar.
Ser is generally everything else. This would include genetic tendencies(tall, short, brunette, gender, skin color, etc .) Also included are personality, origin(from the USA, French, Italian, etc.), profession(teacher, officer, president, etc.), Time expressions use 'ser'. Son las tres.
Overall example: Mi amigo está aburrido. ( My friend is bored. It is his current state of being.) Mi amigo es aburrido. (He is a boring person. It is who he is, generally.)
Jeffrey O.
Hi that is all I have for question01/09/23