Harbor Freight has a great DA buffer for around $60. Perfect for a beginner. Eastwood sells a great Norton kit that has all the pads, compound and instructions you need for around $100. These two will allow you to do anything from a color sand and buff to a simple cut and/or polish and was. Check their site for Liquid Ice. I've been using Norton products since my dad threw me in a paint booth 30 years ago. Love them!
If you want simplicity, stick with a polish followed by a wax every few months depending on environment. If you want to go the ceramic route, it's highly advisable, but paint correction is necessary before sealing or else you will seal the imperfections below the ceramic. Ceramic also requires a respirator to apply. It has some nasty VOCs. If the manufacturer states you don't need a respirator, it's not ceramic, it's a polymer. The polymers aren't bad themselves, providing nearly the protection of ceramics, but not the longevity.