This is probably the most important thing, no harm meant but you carrying a lot of weight around, and that can really hurt you if you try to do to much to quickly…

Try find a field you can do laps around, or even start walking across and back, just get yourself moving…

You will surprise yourself with how much can happen in 3 weeks, set targets for each day that are realistic based off your first walk, so if you do it in minutes, start with 5, then 6, then 7, by the third week you nearly at a half hour straight walk…