I have the same problem. I found a used physical copy of "No Fear Shakespeare - Macbeth" to be very helpful. On the left page is the original text, on the right page is are notes and a translation. I was able to get through the book and understand it.
You can access online here: https://www.sparknotes.com/shakespeare/
> what you think makes it outstanding?
I'm not the original commenter, so speaking for myself only. I would say the prose is very poetic and has a certain magical quality to it.
As for what's great:
1) Masterful plotting, leaving just enough up to the audience to figure out (and, more often than not, leveraging that for ironic purposes).
2) Outstanding characterization.
3) A hard-to-pin-down quality that makes relating episodes, characters, and exchanges in his plays to real life the most natural thing in the world. There's a reason we've ended up with so many of his characters and phrases as parts of the English language itself.