So I've had hypothyroidism since at least 2020, maybe longer. I've been gaining weight and losing both mobility and stamina since then. It got to the point where I couldn't put on my shoes without an extra-long shoe iron and would get too winded to continue after depressingly short walks.

I was diagnosed earlier this year and put on levothyroxine, and I already feel a lot better. Managing that medication is obviously something to work with my doctor on, but I haven't gotten much advice on how to address getting my body back to where it was prior to the illness really getting into gear. I wasn't crazy active back then either, but it's like night and day to compare me now to me in 2019.

I attempted to start some low-level at-home strength training and to start taking more regular walks back before I was diagnosed, but I struggled with even extremely mild beginner-level stuff absolutely wiping me out and my endurance never increasing. Now that I'm being treated, I suspect I will be able to build up strength/stamina/etc. more easily, but emotionally I'm still pretty vulnerable to feeling like exercise is something insurmountably difficult, which obviously makes it hard to start a more regular routine.

Losing weight is something I should do, but it's not my #1 priority here -- I mostly want to improve my mobility and stamina so that I can increase my activity level at all without feeling like shit. Most beginner-level exercise recommendations, be they strength or cardio, start at a level that is above what I can currently physically accomplish. So any recommendations for ways to get started more gradually so that I can make some amount of this exercise part of my routine would be really appreciated.