Learn English – the difference between “behavior” and “behaviour”

The link refers to a comic strip with a public speaker saying each line in turn.

In the first line, "change" is a noun, and it means something new, presumably in a political sense.

Who wants change?
Who wants politics to be different than their current state?

In the second line, "to change" is an infinitive verb, and it means to become different, or more specifically here, for a person to alter his or her own pattern of behavior.

Who wants to change?
Who wants to alter their own way of living??

In short, we all want things to be different, but nobody wants to adapt to make that happen.

Anger: in BrE

to get cross; to get angry (among many others but not with get)

Anger: in AmE (among many others but not with get) to get mad, to get angry, to get cross

In both varieties of English: insanity is:

To go [become] mad but: to be mad in BrE means to be insane.

Whereas in AmE: to be mad means to be angry.

Minor point of slang:

in BrE, to get pissed means to get drunk. In AmE, to get pissed means to be angry.

I sincerely hope you do not get too confused. As you are most certainly not an absolute beginner, this stuff is right up your alley. :) PS: I am not pissed in either sense, BrE or AmE.