It's not a trike, not a car with three wheels or a strange motorcycle.
Sidecars are unique vehicles.
They are asymmetric with more weight on one side of the bike, they are one wheel drive with the driving wheel off centre and the wheel positions mean that not all wheels have the same loading.
To learn to ride an outfit you have to practice on one.
Sidecars are not for everyone. They are arguably slower than solo machines, they cannot filter in heavy traffic and they corner flat. If you are a rider who enjoys sweeping turns, counter steering and the smooth, effortless riding characteristics of a modern sports bike, you may not like sidecars.
Cornering with a sidecar is different. You corner flat, there is no counter steering; you haul on the bars, lean in, the tyres scrub and bike a rider work hard to keep everything on track.
Piloting sidecar is a unique skill and there are a few points that the rider should be aware of in order to stay safe. Here are some general rules worth stating here to help a new rider stay safe.
Unlike most road vehicles which are designed to slide before they tip over, sidecars are inherently more unstable. Similar to quad bikes and trikes, they have a reasonably high centre of gravity and as such are susceptible to tipping.
Additionally they are asymmetric, meaning there corning characteristics are different for left and right handed turns. These parameters can make piloting a sidecar hazardous. However it is precisely these things that make them challenging and fun to ride at the same time.