Follow this list of tips for newbie truck drivers and I can guarantee you that your first truck driving job will be much more pleasant. Even if you are an experienced driver you could learn a thing or two from this list too.
As with any job there is also a learning curve to driving a truck and being a truck driver. CDL school trains you to get your CDL but it doesn’t train you to be a truck driver. Being a newbie truck driver you will come across things that no class or trainer could train you for. This is called learning from experience.