You make a plan to run for three days and take a day off, or run for five days and take two days off on weekends. You can play basketball or do some push-ups on weekends.
Your running posture is correct, as long as your heel doesn't land first, there is no problem.
In terms of speed, as long as it is not too slow, it is no problem to keep the speed at around 8-9 kilometers per hour.