Context is key with collective nouns. "The Manchester United team is playing the Liverpool team" is correct, but "the Manchester United team put on their jersey" is incorrect. Conversely, "the Manchester United team are playing the Liverpool team" is incorrect, but "the Manchester United team puts on their jerseys" is correct. The distinction is a nuance between how collective or individualistic the actions are among the members of the collective noun. The whole team isn't all fitting into one jersey, but every player is wearing one. On the other hand, the entire team is playing against Liverpool. English is filled with these nuances, and sadly many forget about them. This is unfortunate because they can add meaningful tone. For example, "if I was a woman, I would buy a dress" is incorrect because a man will never be a woman. However, "if I were a woman, I would buy a dress" is correct because the purpose clause is entirely contrary to fact. I recommend learning these complex grammatical contructions, that you might enjoy English more in your reading and writing. Good luck learning advanced English!