After stopping for a lengthy time, you wish to continue driving. What should you do?

Your answer is fully correct. Before continuing to drive after a long stop, German traffic rules require you to ensure safety by checking three main points: first, look under the vehicle to make sure no children or animals are there, preventing accidents when you start moving; second, inspect the vehicle's condition visually to detect any damage or issues that might affect safe driving; and third, verify that any load or cargo is properly secured to avoid hazards caused by shifting or falling items. These steps help prevent accidents and ensure the safety of all road users.