So would you say that 106 FA would be good enough for my minor swirls??
Judging from what you describe in terms the severity of the swirls, the cler coat of your Altima, and the GG your thinking to get, I believe the 106FA will be a good selection.
The other thing that you can do is to additionally get a small bottle of M105
Meguiars Mirror Glaze #105 Ultra-Cut Compound, polishing compound, ultra cut compound, paint compound, car polish
For 11$ you have enough compound to do your whole car (which i still think it wont be necessary) and have some left.
Unless you detail cars professionally there is really no need for a ton of compound. Once you correct the swirls in your car, you don't really need to compound again and the 106FA will be more than adequate to maintain a perfect finish.
I suggest to pair the M105 with a Lake country Hydrotech Cyan Cutting Pad and the 106FA with a Lake country Hydrotech Orange Polishing Pad.
6.5 inch pads are great for hoods and roofs and big doors, but you will need at least 2 5.5 inch pads for tighter areas.
Your DA is great for applying waxes and sealants as well. Put on a LC HT Crimson Pad and Choose any wax or sealant. I really like Collinite 845. Cheap but great.
Before polishing make sure you wash and clay your paint. Work as clean as you can possibly imagine through every single stage.
Wash, Clay, Correct/Polish, Protect.
I'll try to post some pictures for you tomorrow.