The manual for the axle (part of your packet of manuals) should tell you how to adjust the brakes. They don't adjust automatically. It's not a complicated process--takes me about 5 min. per wheel, but you may feel more confident having someone show you how the first time. You'll need a brake adjusting tool; less than $5 at an auto parts store. It looks like a bent-up screwdriver.
The same manual may also address wheel bearing repacking info.
It's never too late to have a happy childhood!
Lee, WU0V, and Courtenay, N0ZDT
2011 Rockwood A128
2000 Silverado 1500 pickup
60W solar system
2000W inverter generator