Run/walk anxiety attacks

I love do those run/walk intervals.  I believe it gets rid of my anxiety attacks/panic.  I look forward to Pahla B Fitnes run/walk intervals every day.  When I first started, I headed straight for her 5K run/walk on YouTube.  Then I ran the 10K.  After I was done with the run/walk I would recover and meditate.  How can I sign up for a one-mile run/walk just to start easy?