Congratulations!! I know what a big deal that is. As someone who always hated running and thought I'd never be able to do it, I literally cried with joy/amazement the first time I finished a 1+ mile run.
And 11:40 is fast!!! Definitely keep up with the running - it gets even more fun over time.
Be careful of adding too much mileage too quickly though, as that can be a recipe for injuries. Nothing wrong with incorporating it/building up slowly.