Hello Slapshot, I would think once you have the burn off performed I would do the "biscuit test" on the lower and upper rack. There are several videos on YouTube (Sambo's Place) that show how to perform this test. It really gives you a great idea of where the hot spots are on the grill.
Also the types of pellets you use does make a difference. I have been a Weber user for over 20 years, big fan. Their pellets are good, but I tend to go with Royal Oak Charcoal Pellets for grilling (350 - 600 degrees) and Smokin Pecan Shell Pellets for smoking (180 - 300 degrees). However there are a lot of good quality pellets. Just know some burn longer than others, some use oils and saw dust to get to smoke flavors, and others burn really quickly.
Lastly for beginners, be good about maintenance and clean up. Especially from long cooks. Get familiar with taking everything out to get to the burn pot, have a small shop vac, and scrap/clean often.