Another newbie with another new Yaris Question

[sherriebythesea]

I got my Absolutely Red 5dr lb two weeks ago. I love my little Rosie!!
But I live in Tucson, AZ and I'm worried about protecting her from the sun. I don't have a carport or garage so she will be exposed virtually 24/7.

I have the Meguiar's Clay Kit, Absorbers, MF clothes, 2 buckets, a MF mitt and tomorrow morning is when I'm going to do it. Couldn't before now because it's either been too cold or raining. Strange spring for us.

Should I use Dawn to strip the dealers wax off? If not then what?
The Clay kit comes with a "cleaner wax". Should I use another wax on top of this or instead of??

What wax would be best to use to make sure Rosie doesn't get sunburned??

Thanks in advance for the advice

Sherrie