If you are a proficient bike rider it shouldn’t take you long to get the hang of riding a cargo bike. With their longer wheelbase and extra weight they do take getting used to and are not quite as nimble as an ordinary bike.
Trikes are easier to ride as they remain upright when stationary.
Please note: Cargo stays still when being carried. Children however, tend to wiggle around which affects the balance of the bike. If your children are habitual wigglers you may wish to consider selecting the optional seatbelt harnesses which will restrict their wigglyness. (If wigglyness isn’t a real word, it should be!)