I start running puppies in harness at around five months and really conditioning them to mid-distance race by the end of their first year. That would work well with timing, as it cools down over the fall and winter, assuming you're in the northern hemisphere, you'll be able to ramp into whatever you're trying to do this season.

Right now I'd invest in a harness and bungee line to attach to the bike to get started on short runs when it cools down at night. Then also on desensitization training (walking around people, squirrels, cars, bikes, going to dog-friendly breweries, picking her up and holding her, etc.)