Doing bodyweight training and running is having a movement practice. It may be different from what you were doing, however, you are remaining active. Keep doing it in whatever capacity you are able given the current conditions. Load within available ranges without causing discomfort. Loading new ranges help to have more permanent change.
Have you visited the pain section of the virtual mobility coach?
There is a front of the neck section and back of the neck section.
Working downstream of the neck will help.
Do you have forward head on neck?
Are you seeing improvements in the pain level with what you have been working on?
Couple for the hip/low back
Episode 281: Runner’s Legs and Hip Extension
Episode 168: Simple Recipes for Fighting Common Back Pain
Yes, you can continue working on your neck pain and do the 14 day challenge.
May need to spend more than 2 days on an archetype based on your assessments, however, this will get you started.