We can conjugate the verb "ir" in all forms in the present tense as follows;
Singular:
Yo voy (I go)
Tú vas (You go)
Él/ella/usted va (He/she/you go)
Plural:
Nosotros vamos (We go)
Vosotros vais (You go (informal plural))
Ellos/ellas/ustedes van (They/you go)
How to answer what you do on the weekends
To answer the question of what you do on the weekend in Spanish, you could say; Los fines de semana, me gusta relajarme en casa, leer un buen libro y ver películas con amigos. This means that "On the weekends, I like to relax at home, read a good book, and watch movies with friends."
You could also say the following; Voy a la biblioteca el sábado por la mañana para buscar libros nuevos which means "I go to the library on Saturday morning to look for new books."