How long should it take?

<p>So I'm self-studying the following:</p>

<p>AP US Govt.
AP Psychology
AP Statistics</p>

<p>I mean, I know I should start early, but like, how long should it take?
Is it just a bunch of memorization?</p>

<p>I have PR for US Govt, and Barrons for Stats and Psych.</p>

<p>thanks,
ansar</p>