My advice which is the same advice I got from most here, especially when I first started: get rid of that arbitrary goal. Just run.
The reasons for that: 1) That may or may not be where your current level of fitness is. Trying to hit some arbitrary round number doesn't help you. 2) On any given day, due to numerous variables (stress, sleep, diet, hydration, weather, terrain, etc), you may be faster or slower than your current fitness pace. Trying to hit the same number on every run is a recipe for disaster. 3) The more you run, the faster you will likely end up getting, especially in the beginning.
You should pull up your HR and simply run by that. Some days that might be a 10:30 pace. Another day it might be 9:45. Another day it might be 10:00 exactly and make you incredibly happy. But, just run by HR (and feel). In other words, just run. Keep it easy most of the time. One day you might be feeling particularly spry and you can go faster and see how it goes. Might be for the whole rest of the run. Might just be for a mile or two. Beauty of it is...it doesn't matter. And then afterward, just run slowly again to recover.
And with Strava, it'll keep track of all this data and you'll be able to go back and see how you're improving. Or if you're not and if something might be going on. But right now, just starting out, don't worry about the data and numbers. Run first, analyze afterward. This is coming from someone that wanted to do exactly what you do when I started.