Wanting to move is not the same as being able to.
Your available energy, mobility, and skill matter. Difficulty getting to the floor is not unwillingness.
Different support changes the experience.
The floor gives body-weight self-massage its characteristic contact and pressure. A mattress, chair, or other supported position changes those mechanics.
Choose support that suits your mobility and the movement you want to explore.
Leave room for the rest of your day.
A session need not use all the capacity you have. You can pause while there is still something left for conversation, a meal, or whatever matters next.