I think I would become a mermaid to move in the waters without aging, it would be fluid movement and help me move from one point to another 😅😝🤣, however, taking the question seriously, if walking is the problem, I would be sitting most of the time with electric chairs and would adapt my house with pulleys and ropes to move objects from one place to another.
And I would buy the new walking bike, that would be my best investment to live a life without real movement of my feet. You would walk less and travel longer distances.