Coming from a D1 cross country and track runner, the best way to get better at running is to run more distance. You don’t have to run as hard as you can. Increase the distance by 5-10 miles a week. Once you get your run length up and you aren’t hurt you want to work in different interval types of workouts; not necessarily for the speed but so you can get the pace in your legs. Obviously we are on a bit of a time crunch at this point but at the end of the day if you want to get quicker, then run farther. If you want more specifics then feel free to message me directly.