Simply do it. This I thought this morning. I rolled out my mat. To feel warm I had put on a cotton t-shirt with long sleeves. It helped, I felt comfortably.
I practiced primary without ambition, very cautious. I could only hook my fingers when I did marichyasana b and c. When I did supta kurmasana my fingers could only touch. I didn't drop down into urdhva dhanurasana, but I arched back deeply. I practiced, yepeeeee.
Of course I feel excellent now.