There's a book's worth of information to answer this question. My 1st suggestion would be to talk to your coach or a local coach. However, I will put a general plan down below that foucses on training energy systems. You can run for time vs running set distances on a track. Hopefully, you have access to a level field or trail. Here is an example of something you could do as general preparedness.
Day 1. 5-6 second sprints all-out. 1-2 sets of 3 reps with 3 minutes recovery and 8 minutes rest. Then you could do 2-3 20 second sprints at near full effort with 10 minutes recovery.
Day 2: Run for 20 seconds at the pace you would race a mile. Then rest for 40 seconds. 10-15 repeats, increasing to 20 over time. This can be down on a football or soccer field where you run end line to end line. You start on every minute. Say if it takes you 22 seconds to run the distance, you then get 38 seconds rest. The run time can vary, but you always start on the minute.
Day 3. 30 second runs at approximately 800m race pace. Err on the side of being slightly slower vs going too fast. 2 sets of 3 reps with 3 minutes between reps and 10 minutes between sets.
Day 4. Continuous, easy 20 minute run. Finish with a few strides of 6-8 seconds at a moderate effort
Day 5. Do your hill sprints
They key is to build progression in over time. Good luck.