Try something fun, it doesn't always have to be something boring.
You can hear music in spanish(i recommend the old mexican songs) and you can also learn tongue twisters. And if you can to learn good spanish you can hear the news on noticias telemundo. try to rap in spanish
The answer is es and están. It’s es because it is a characteristic. It’s son because it’s plural, and aburridos meanest it’s a characteristic. La película es muy aburrida y mis amigos están aburridos de verla.