"We drink tea."
Translation:אנחנו שותות תה.
the words אנו and אנחנו have the same meaning, אנו is more formal.
the word "אן" doesn't mean אני. I can think of two possible meanings of אן: it can either mean the name Ann or mean "where" in a very formal register (but a variation, לאן, is used in the spoken language meaning "to where").
The pronoun will tell you, if that's the subject. אנחנו אני היא הוא הם הן Etc etc.
Or if the subject is . ספרים, you know that's plural... If it's a female dog, or dogs כלבה, כלבות. Some look female but are male. Like male lion = אַריֵה Lioness: לְבִיאָה Lions: אריות Those we need to memorize. You need to have the tips and notes for Duolingo Hebrew. They're not in the app, only the website.