Miraculously, I found out that the trouble I’d been having with my treadmill was due to the belt being loose.
Once I found the right tool for it, tightening the belt was actually extremely simple. From there, I experimented with how tight the bell was to come to a satisfactory setting that kept the belt from moving every time someone was on it but was tight enough to provide some resistance for in terms of exercise. Now all I have to do is attempt to align it so that walking on it is more comfortable (or get used to the incline that… seems to come part and parcel with it). Ideally, I would like to walk on a treadmill that is as close to flat as possible, although I can tell that I may not be able to do that with this one. But at least I have one, am I right?
But I am going to see if I can get the treadmill as close to flat as I can before I plan out any sort of exercise regimen, because the angle at which the treadmill is raised off of the ground will determine how long I walk and how frequently I walk for that length of time. It might also decide how far I walk on it as well since the treadmill does have a neat little gadget at the front that tells me useful information about my walking on it.
At least the issue of “the belt keeps moving while I’m trying to walk on it” has been solved, though…