Learn Portuguese (Portugal): Nós temos pouca sorte.

The word for "little" or "few" changes to match the gender and number of the noun it describes. Because sorte (luck) is a feminine singular noun, the quantifier must also be feminine and singular, which is pouca.

How do I know that sorte is feminine if it ends in an "e"?

Nouns ending in "e" can be either masculine or feminine in Portuguese, so you have to learn their gender as you go. However, in this sentence, the feminine ending of pouca gives you a built-in clue that sorte is a feminine noun!

Is it okay to leave out the word Nós?

Yes! In Portuguese, the verb ending usually tells you who is doing the action. Since temos always means "we have", you can safely drop the pronoun and just say Temos pouca sorte.

Does this mean "We are unlucky"?

Yes, it means exactly that. English speakers often say they "are lucky" or "are unlucky", but Portuguese speakers use the verb ter (to have) to say they "have luck" (sorte) or "have bad luck" (azar).