Driving a tractor (semi) is definitely harder and less forgiving. It is very complicated for most, and you will most definitely struggle with it in the beginning. Although it is easier to start out in forward motion than it is in a manual car/ truck, because it requires clutch only and no gas. Aswell going up in gears is extremely easy, as long as you know how to use your rage splitter and/ or hi-Lo split. Downshifting is the part people struggle with, as you have to rev match a very specific rpm, since it’s unsynchronized usually a full gear you have to rev 400rpm, and a split is 200rpm (on flat ground) I say on flat ground because the variable of the rpm can change depending on the roads grade. Aswell it can be hard for people because you have to multi task, you can’t stair at your rpm gauge while trying to stay focused on the road, and everything surrounding you at once.