What happened in the final episode of the Evangelion TV series, titled "Take care of yourself"? What actually happened in the last episode of the Neon Genesis Evangelion TV series? It is episode 26, entitled "Take care of yourself"?

I have read different wikis about the plot of the episode, but I still don't understand it.
It's a little disguised, but the overall meaning is not too complicated.


   Thought the whole series, Shinji was struggling, because he has made a
 shell to cover himself, not to expose his feelings and fears. Shinji
 had (as we all do, probably) a lot of things that were bothering him
 inside: the relationship with his father, the desire to find a place
 in this world, and so on and so forth, questions like "who am I?",
 "what am I supposed to be?", "what do I want to become?", "how other
 people see me?". 
 Finally, Shinji views the world, and himself, in thge comedic high
 school setting with other characters talking to him, trying to help
 him answer all those questions. It's something like a visit to a psychotherapist, where the role of the psychotherapist is taken by all the people he knew. Finally, they help him to destroy his
 shell. He realizes his self-worth. He realizes that he can live the
 life without Eva, and make it worth living. He manages to acquire the
 will to live, which he was lacking before.