If you want a good setup i'd just invest in the edge 2000 system.
That way you dont have to worry about changing backing plates for smaller pads or the velcro wearing out on the pads.
The 6inch edge wool pads are without a doubt the most user friendly pads for beginners. Being small they are extremely easy to control. Best soft and rounded they hologram less and you dont have to worry about keeping the pad dead flat when you buff as the pad wont go flying across the paint.
Of course i wouldn't recommend all your pads to be wool but for polishing and swirl removal, wool is much better and safer on the paint than foam pads. Anyone who says otherwise hasn't used a decent wool pad.
You can then progress to the larger 8 inch pads when you get good technique.
I'd personally start off with the Edge blue wool 6inch pad. Being a finishing pad it has next to no cut. Its my most used pad, though i now use 8 inch blue wool pads as i can control them well and finish down LSP ready to every car i've done so far. I still use the yellow cutting wool pads in 6inch though, the smaller pad size i find easier for defect removal.
I'd suggest:
A pair of 6inch yellow wool pads for big defects
A pair of 6inch blue wool pads for general polishing and light swirl removal
A pair of 6inch white wool or foam finishing pads, in case you get some very soft black paint.
Though if you have a PC already you'd probably use that for final finishing on the difficult cars.
Its a shame no other manufacturers make wool pads from cutting right to final finishing that are available on the web.