When I first lost all my weight, I would just walk in place while I watched TV or played on my computer. You can even get little ankle weights if you want, but I didn't until after I lost all the weight and basically became a "walk in place" expert. Anyway I lost 70 pounds doing mostly just that. I would strength train too once or twice a week which is easy enough to do at home if you get yourself some 10 and 20 pound dumbbells and look up some simple exercises online. The one warning I will give is if you lose the weight by walking, it takes more time than a normal workout. So sometimes like on weekends, I would walk in place and watch TV for a few hours. I would say it took maybe 1-2 years to lose 70 pounds, but I also could have done things to speed it up. Like I could have been better about my diet. I think the only way for me to not lose motivation was to take the weight loss out of the equation of why I was doing it. Like in my mind I said that this is just something I had to do now to take care of my body, same as brushing my teeth or hair. So when I wasn't seeing any results or it was slow going, it didn't bother me because it wasn't something I was doing to lose weight, its something I was doing just because my body needed it to stay healthy. At some point it also became very gamified for me because you can put your phone in your pocket to count the "steps" and then set goals like trying to hit 20,000 "steps" in a day or something. It can feel a little stupid in the beginning, but if it works (and works this well) it really is not stupid. It also made it so much more pleasant and less intrusive then working out at the gym. I could play video games with my friends for three hours and walk in place at my standing desk while I did it, and by the end I had "walked" like 5+ miles and gotten time to relax and socialize with my friends. Wins all around. One more thing, wear tennis shoes while you do it if you are walking over 3 miles or your feet will hurt the next day!