Just starting out the key is to not put scratches in the fresh paint.
Learn the "two bucket" method where you wash the car, then dip and rinse the sponge several times in the "dirty water bucket" then pick up some clean soapy water from the clean bucket. Buy a few MF wash sponges, if you drop one, throw it in the bucket and use the alternate. Also use a good car wash soap (Meguiars Gold class or ultimate) so you dont strip the wax that is there. Use only the dosage they recommend and not more.
I also use the Absorber drying cloth. use it like "shammy" where you squeeze it out the drape it over the car and drag it over the wet spots. It doesn't get it 100% dry but the small film of water left evaporates to nothing. it MUST be wet before you use it. it stays kind of damp in the plastic tube it ships in.
I have Klasse and find it finicky to polish off. When I have time to do a good detail I will pull out the Klasse but most of the time I use Mother's or Meguiars wax from walmart. Much easier apply and remove. Just keep it off the black plastic trim.
One last thing to consider is a clay kit. I like either Meguiars or Clay Magic. Claying doesn't do much for the shine but will make you paint very smooth to the touch. Mosquitos will slide off the finish.
You clay after washing.
I do in this order.
wash,
rinse,
clay,
rinse,
dry,
wax.
Between waxings its wash, dry and maybe a quick detailer/spray wax.
If you like REALLY tight beads of water falling off your car, try Colinite 845 insulator wax.
If you like your windows beading, a step up from RainX is Aquapel by ppg. Last longer and doesnt streak with good wipers (Valeo, Bosh, RainX)