I'd love to join in. #23 again if you have it, please!
CruiseCAT, it's a lot harder to run outside because a treadmill helps propel you to a very small degree and asphalt and concrete are harder than a treadmill surface for sure. I remember when I graduated C25K on the treadmill and first started running outside. It was brutal. A lot of it is psychological/visual, too. Being outside can make you feel slower, even if you're going the same pace as on a treadmill.
Anyway, if you can run 3.1 miles on a treadmill there's no reason to start C25K over on the street. Just do what you can do and start to transition to the outside, and your body will adapt much faster than you think!
If you have a local track somewhere that can also be a good way to transition. The surface of a track is a lot more forgiving than the street and it can help with the impact while you're trying to adjust your form. Either way, don't be intimidated by it. You can definitely do this, just take it easy at first
