You ise ser when your talking about something that is apart of you or someone but estar is a temporary form or state of being. Yo soy simpatico vs. estoy en casa
In Spanish a personal A used when the direct object is a person
Example: Brooke llama A Elsa In English this means Brooke calls Elsa But in Spanish it is being use mostly at a person but can also be use at an object Hope this helps :3
