Help with pronouns: Addressing my elders at a family dinner

I grew up in the US and am trying to reconnect with my extended family in Vietnam, but the kinship pronoun system is a nightmare. I keep accidentally calling my cousins 'anh' or 'chị' when I should be using something else based on their age gaps relative to my parents. How can I practice getting these pronouns consistent so I don't sound disrespectful during my first real conversation with them? I am asking specifically about learning Vietnamese, not a generic study routine.