Boy, oh boy, do I wish I had actually taken the time to learn how to use this thing.
Count on just slowly putting around for the first 40 miles at a minimum. Short progress can be very misleading.
I started out on the front lawn just doing lazy laps and figure eights. Your feet are basically useless blocks of meat for the first ten miles imo. At first, you may have very little stamina and the sensations are meaningless, which is a recipe for falling. After a while you become way more comfortable just standing on the board let alone interpreting the sensations your feet are telling you. You may even be able to carve on the flats ok, but an uneven road surface will substantially alter the sensation, and there is a surprising amount of that type of situational experience to acquire while riding these things.
Hard heel-side turns require a degree of trust in the board as well as a strong sense of balance (you're basically performing your own trust fall). I was legit intimidated by it for the first 20 miles and I'm a well-seasoned snowboarder. A complete novice would be smart to just take it REALLY slow. Wear all the gear. Never stop wearing a helmet imo.
After you master the lawn, driveway or parking lot, then try a road or sidewalk. Traversing inclines can be kinda trippy. Just my two cents on the subject.