Just my 2 cents as a newbie myself.
Start with the basics and add to it as you see fit or your needs change.
Start with 2 wash buckets with grit guards. Then you'll need some soap, wash mitts, MF towels, brushes, clay, and wax.
Once you get started and see where you're at when you get your vehicles clean. Then you can seek advice and other products you'll need to start correcting paint and other detailing you want to achieve.
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