"Hamlet acts mad"

That's a poor statement. Change your diction.

Don't use the word "ditties".

The 2nd sentence needs to be divided some way. It's too long and confusing.

3rd sentence, after Laertes, change that comma to an emdash.

Well, that's an edit of the introduction. I'm too tired to edit the rest of it.

Overall, though, I agree with the other two people. Too many commas.