Stretches or exercises for Poly Myalgia Rheumatica

Hi there

i have recently been diagnosed with PMR and am currently on steroid treatment. As the steroids have been reduced the pain and stiffness have returned. It is preventing me from being fully mobile. Are there any stretches or exercises I could do as soon as I get up to help the stiffness. I have invested in some walking poles and am itching to get going with those but I can’t get past this stiffness. Thank you.