Not a trucker, but an uncle was (until he got an accident which cost him the use of his legs).
hours are long, sometimes very long. There are limits to the number of hours you may drive per day, but that just means more time sitting in highway carparks or dozin in the cab while your partner drives.
pay is low, especially for independent truckers. Those in employ usually have union wages, independents pick up the scraps and competition is fierce. Even for union wages, they aren't all that high (about what you'd expect for what is just above unskilled labour).
After a while it gets boring, unless something dangerous happens. My uncle drove to the middle east a lot, sitting at border crossing with guntoting Arabs inspecting your truck for pork and porn isn't funny. Neither are pisspoor weather at night with the inherent large risk of accidents.
Expect to drive the same route a lot. After the first few times you've seen it all, and you almost never have time to see more than the highway and reststops anyway. Come everywhere, see nothing.
He drove all over Europe. Often away 5-6 days a week, on the road. No proper hotels (too expensive). Sleep on a truckstop in the truck, eat in the truckstop and hope they have a clean toilet and shower.
I wish I were flying