I am curious as to whether I can infect people with the running bug, and the 21 days challenge is my first test, hopefully of many to come. They will all involve some element of consistency because I strong believe that is the foundation for doing anything - showing up and putting in the work, day in, day out. You have demonstrated that and even made some PRs in your 5k distance. Remember, increase your distance a little bit at a time to avoid the risk of injury.
The shoes you have selected here are the Alphafly version 1! A personal favourite and I actually have 6 pairs of them!