You should adjust your preparations depending on what your personal goal is for The Wings For Life World Run. If you just want to run as fast as possible, add speed runs and extra rest intervals into your training schedule. If you want to try your very best to run a longer distance, train with easy longer runs. If you want to get the best out of yourself, combine easy long runs with intervals and then add easy, faster shorter runs.
If you want to start and run for fun and just feel good, then make sure your preparations are fun too.Vary your workouts or run together with others to keep it fun. Vary not only the time and distances you run but also the routes and, for example, your playlist with music. A faster run is especially fun for everyone not really into tight schedules but still want to add some intervals / speedwork to their trainings.
Just play around with your speed during your run based on the environment you encounter. To start, run easily and then for example, take a little sprint to every 5th tree or towards every green car that’s parked.