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I'd expect your clear to be pretty hard, but the only reason it'd *really* matter is if/when you try to polish out any marring; if it's really hard you'll find this to be pretty difficult, at least if you expect 100% perfection (so, well, don't expect that

).
I *always* recommend 1Z brand polishes for people just starting out. They're effective and incredibly user-friendly. With scads of products from most every maker on my shelves, I still reach for 1Z quite often. I recommend their Paint Polish as I suspect their milder Metallic Polish with Wax will be too mild for your clear. But hey, I'd *really* suggest you buy them both so you have a medium and a very mild polish on hand.
If you think your paint is in great condition, and you want to keep this *very* simple, just get the Metallic Polish with Wax and use it before the Collinite. I'd be hard pressed to think of any product that'd be easier to start out with.
Collinite works great over these 1Z polishes (which leave a little wax behind, so if you're tuckered out after all the polishing you can wait and wax after the next wash).
Sources for 1Z and Collinite:
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The Klasse AIO is a versatile product that's nice to have around, but I dunno if you *really* need it. Their Sealant Glaze (which I do use on one of our vehicles) probably isn't best for you as it's utterly unforgiving of any flaws (they show up whereas a wax like Collinite will hide them a little, as will the 1Z polish) and it's not all *that* user friendly. The Collinite will provide just as much protection anyhow. IMO they oughta just offer a money-back guarantee on the 1Z/Collinite combo, I bet they'd never give back a penny.
But as
SuperBee364 has already suggested, the *biggest* thing is to learn how to wash without marring the paint. That's *far* more important than which product(s) you use or anything else.
The bottom-line goal really oughta be to not induce any scratches and that's a *LOT* easier said than done.