Critical thinking is really easy. Just take something that is self-evident or obvious and start thinking about why you believe that thing. Doubt it for a moment

Critical thinking is really easy. Just take something that is self-evident or obvious and start thinking about why you believe that thing. Doubt it for a moment and come up with evidence for (or against) the thing. If you get into the habit of doing that, you will be a great critical thinker. Especially do this to new information that enters your system. Critical thinking is not a difficult concept to grasp at all.