Only thing to note with AG SRP is that it does contain silicone. This isn't a problem in itself, unless you get to the point of needing / wanting paintwork done. It causes problems as the silicone gets into the paint. That said, I still use it at times, just don't let it dry on too much.
As for polishes, as long as you get one that isn't too abrasive, you shouldn't do any damage by hand. The order you have in your list is about right, but as Stew says, washing after claying is recommended. I actually wash each panel after claying it to prevent stuff drying on the paintwork. You will need the car very dry for polishing, it's a pain when you get water in the polish!!
I am using Chemical Guys SSR1 for minor swirls and then White Diamond Glaze before sealing. The sealant I use has been a bit of a revolution in the car detailing world - look up Chemical Guys jetSEAL 109. Amazing product IMO.
Wax is then a personal thing and down to how much you want to spend. Don't be fooled by 'spray waxes' in places like Halfords. If you want a proper wax, look at Polished Bliss or some of the other traders on here that sell it.
Final bit of advice, don't use a sponge! It has to be wash mitt and two buckets....