go online and get yourself a lightweight rotary and some wool cutting pads (with a medium compound) to finish up all the scratch's and scuff you're not getting too....get proficient with the rotary and go from there :).....it's a great place to start !
don't rely on just a wax...
if you're handy with a polisher and it's outdoors, then polish it every couple months before you wax....a simple car cover will remedy the fact that it's not garaged.....if you use it :)