The actual car wash soap doesn't matter a whole lot.
Two bucket washes/foam cannons if you wish
Claybar/claymit/claytowels
Machine polishing is the most significant change (optional on off road vehicle)
Wax/Sealant: I recommend any si02 "hybrid ceramic" coatings. You can now buy one from Turtle Wax/Meguiars/Mothers at most Walmarts, and that's what I would recommend. Same (or more) durability as the best "old school" waxes, on par with old school sealants, but with 90% less effort when you "spray and rinse off" to apply. $13-25. One bottle will last a few years if you apply 2-3x a year.

Ignore the $100-1000 ceramic coatings unless it's a garage queen. Obtain 90% of the results, in 90% less time, at a microscopic fraction of the price. More than sufficient for 99% of the general population.