30 years of detailing experience and concourse events.
If your just starting out, I recommend investing in a foam gun and learn this method. I have migrated into this method with a bucket and my typical kit. The foam gun gets a lubricant over the vehicle more efficiently and helps eliminate scratches. I thought it was a gimmick but have become a believer. I am currently using this model. Get a quality microfiber mit and a good supply of microfiber cloths.
https://www.autogeek.net/woqufofogun.html
https://www.autogeek.net/128ozdpxtfof.html