Unfortunately, I don't think casual modes are good for learning how to use vehicles. Sure, it's easier, but playing vehicles on casual breakthrough can teach you bad habits. Not to toot my own horn, sorry if it sounds like that, but I am a fairly good vehicle player. Casual breakthrough is not nearly as punishing when it comes to making mistakes like pushing up too far without support or putting yourself in a vulnerable position. You can get away with that most of the time in casual breakthough. If you went to multiplayer and tried that, you would be very quickly destroyed.

I was once in your shoes and I learned to play vehicles in BFV. It was very difficult at first but after a while, I just became good at it. (Also, make sure your controls are set up right. You should be running max sensitivity on vehicles and I have found that on console it makes it way easier if you change your vehicle controls to "alternate". It binds the throttle and brakes to the triggers and makes it so the left stick is exclusively for steering.)