V - That's great for a first run. Nice pacing and 3 miles is a good training run. If you add a mile a week you'll be at Oly distance in only a month!! I would stick to 2 to 3 mile runs once or twice per week and one longer run on the weekend, adding 10 to 12 min (that works out to about 1 mile) each weekend.
Have fun and I hope that you're not too sore. It's not easy to run in the hills.