What's the best way to start removing paint on a car?

So I just bought a Honda civic (used off crag's list) and I want to paint it flat green, no gloss or anything. I want to (at least try) to do it on my own, Not sure if ill paint it myself but I want to strip the paint and lay the primer. However I'm not sure what's the best way to start. And what's faster to remove the paint and clear coat.

You don't need to take it down to bare metal. You only need to feather any chipped areas or differences in painted/removed areas, knock off the clear and correct any imperfect spots

The surface needs to be clean and slightly scuffed for primer to adhere unless you're using a type primer that will etch