They're pretty similar. If anything, trucks are harder.

A lot of modern manual transmission cars (very hard to find these days, I don't think the BMW 325 is avaialable with one) now have rev matching to make the shifts between gears smoother without any effort from the driver. You might stall once or twice remembering how to get the car moving, but I doubt you would have any problem.

The old manual trucks I drove 30 years ago had much sloppier gear boxes than cars and you had to get the hang of where the next gear was. I have not driven a manual truck since then, but imagine that the gear boxes are smoother now as well.

These days I only drive stick in rental cars in Europe (not very frequently). It's like riding a bike.