You can use ir (to go) to say where you’re going, or what you’re going to do. Either way you just need to know how to conjugate ir in the present tense. It’s (very) irregular.
|I go||eu v||ou|
|you/he/she go(es)||você/ele/ela v||ai|
Use ir in the present together with any noun to talk about where you’re going.
Eu vou à praia. (I'm going to the beach.)
Eu vou ao supermercado. (I'm going to the supermarket.)
Você vai no banco? (Are you going to the bank?)
Use ir in the present together with almost any verb to talk about what you’re going to do.
Eu vou correr. (I'm going to run.)
Você vai comer? (Are you going to eat?)
Nós vamos viajar. (We're going to travel.)