Breakdown of Nosotros somos buenos amigos.
ser
to be
nosotros
we / us (after a preposition)
bueno
good
el amigo
the friend
Questions & Answers about Nosotros somos buenos amigos.
If a group of women were saying this, would they still use "Nosotros"?
No, a group of women would say Nosotras. You use Nosotros when the group is all men, or a mix of men and women.
Do I always have to say "nosotros" before "somos"?
I thought describing words came after the thing they describe in Spanish. Why is it "buenos amigos" and not "amigos buenos"?
You are right that adjectives usually go after the noun! However, a few very common words, like bueno (good) and malo (bad), often go before the noun instead. Since it comes before a masculine plural word (amigos), it takes the matching form buenos.
How would the whole sentence change if it was a group of female friends?