There's no problem with trialling products. It's part of what detailing is about.
1 Jet wash
Not everyone rinses the car first. Some believe that it helps loosen the first. Others think it means the snow foam doesn't work as effectively. FWIW I tend to snowfoam a dry car.
2 Snow foam
3 Jet wash
3 two bucket wash
4 rinse
Up to this point can be used for regular maintenance washes. In which case, I'd recommend sheeting the water (ie open ended hose, no nozzle etc) as it'll help speed up drying.
Before claying, I'd add in a de-tar process - to remove any tar stuck to the car. This stops the clay picking up the tar and rubbing it around. Auoglym do a tar and glue remover, but my fave is Tardis.
5 Clay
6 rinse
7 dry
8 Polish
Remember. there will be polish residue at this point, depending on the polish used. If you're using Autoglym SRP, then move straight on to wax. If you're machine polishing, I'd probably wash and dry the car again, and then probably add in a glaze/paintwork cleanser.
9 Wax/Protect
Good for paintwork, but you've missed out: wheels, tyres. glass. door sills/shuts, plastic trim, exhaust.