Earlier quoted context omitted.
The rules are too large for there to be a concise resource to learn all of them. I would recommend learning the basic rules and then learning the intricacies playing the game with others. YouTube is probably a good resource for learning the game or go into you local game store and tell the staff you are interested in learning. Be warned, mtg is addictive and expensive.
What's a good concise guide for the basic rules then?
If you have a local game store going in and asking if they have any resources for new players hoping to learn how to play would probably be the best option, imo.
Boardgames are social thing. Magic is the best when there is a gathering.