For Step 1 I use a rotary polisher. I have this, but there's not much difference between rotary polishers.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
I have one of these for the remaining steps. Battery power is a lot easier to handle, and you don't need the power of corded other than when doing major correction with heavy cut compound.
https://www.amazon.com/dp/B08T64P1FG...7-100d59bd966b
I use these pads:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1