While a *LOT* of people get great results with #83 and #80, IMO there are easier products for a beginner. FWIW I never found #83 all that user-friendly myself, and while #80 never caused any problems for me that doesn't mean it'll work great for *you*. Also, I find #80 pretty mild, so unless you have very soft paint I wouldn't expect a whole lot of correction from it.
In cases like this, I always recommend 1Z polishes and AFAIK they've never disappointed anybody to whom I've suggested them. They *ARE* user-friendly and easy to get the hang of. If you over work them they basically turn into cleaner wax (and overworking them takes quite a while). Using them briefly *by hand* will give you an idea of how the abrasives break down (it's easy to break them down by hand and equally easy to tell that it's happening- you can pretty much *feel* it).
Sources:
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FWIW, that orange/#80 combo might not be optimal; I'd team the orange pad with the #83 and the white pad with the #80. Use the orange/#83 until the current marring is replaced by micromarring from the product/pad combo. Then use the white/#80 to remove the micromarring.
One more FWIW- etched paint can be beyond the abilities of the PC. Often it requires wetsanding followed by rotary work, and in many cases I believe it's better to live with etching than to remove that much clear. My wife's A8 has etching and we live with it.
Edit: If you're working with 6.5" pads you might not be able to do all that much correction; I always need 4" pads to do significant correction via PC.