Preparation for a formal education

Hello! I am interested in getting a formal education and want to know how/where to best prepare for entrance exams. Does this site also teach things like reading musical notes and music theory in general? Finally, do you have any advice on how to find places to sing or people to sing with? I took some real-life lessons in the past and was advised to look on facebook but I can't seem to make heads or tails :/

Any sort of direction would be greatly appreciated.

We don't focus heavily on music theory or sight reading, though I've done a few live lessons on those topics:

https://www.youtube.com/watch?v=xp8FVRqu7Zk

https://www.youtube.com/watch?v=wxo08FQw41c

I recommend a book like https://www.amazon.com/How-Read-Music-Days-Beginners/dp/1977904874. You can also learn a lot for free at https://www.musictheory.net/. 

In addition to Facebook, I'd search for choirs in your area and ask the owners of your local music store!

Thank you very much!

Happy to help, Liam!