In English we have two demonstrative pronouns, which both have plural versions. Take a look at this short video to learn the basics.
Short, fast, off-the-cuff English lesson with Mike Bennett on the subject of indefinite pronouns. Pronouns included: someone / somebody; anyone / anybody; no one / nobody; everyone / everybody.
Learn three important rules for using pronouns with Flocabulary’s educational hip-hop song and video.
So you know that birds of a feather flock together, but a flock of birds doesn't always fly together. What if one bird goes rogue and flies out of formation? Click this link to learn more about collective nouns.
What's the difference between a common noun and a proper noun? This video by Khan Academy will explain it to you.
This student-created video by Harry Judd is both informative and funny. Hopefully, this will help you distinguish concrete and abstract nouns.