About 'prepared'

[DreamFounder]

When I was reading a dialogue this morning,I saw the word 'prepared' in the sentence 'I mean, I love pretty much everything he does, but, nothing, nothing could have prepared me.'. I think I have leaned the word before but here I don't know what his meaning is.Please help me sir,thank you.

Apart of the dialoge

Mason: I had no… I thought it was gonna be a lot more dramatic. I didn’t think it was just gonna be this kind of really outrageous comedy. Uh, Steve Carell I love.

Kevin: He’s good.

Mason: I mean, I love pretty much everything he does, but, nothing, nothing could have prepared me.

Kevin: There you go.

[Tdol]

I was not expecting what I saw- nothing that I know of him and his work had prepared me to expect what I saw.

[DreamFounder]

It means 'I' am not very expect what he will do next(next comedy or other things)?