Starting a New Workout Routine

Tonight, I did a workout routine after months of being turned off from working out. I took a health class last spring semester that got me really motivated about working out, and I wanted to begin right away, but alas, I began too fast and too soon. Everything I tried was too difficult, or I just didn't stick with it very well. What I found was that after working out, my ribs would hurt, and I attribute that to having done too fast, too soon. But I now realize the necessity and great importance of starting off slow. A slow start will allow me to work up to a good level of aerobic health, which I especially need because I have asthma and going up a flight of stairs usually kills me! I do think my aerobic health has improved a bit here because I've been doing more walking. However, I want it to continue to improve and to do so faster, and I also want to build up my strength, especially in my legs and arms. Down with weakness! I say yes to strength and health and no to all else! My goal is to keep doing my 10 minute workout, and I started with this video, but mostly kept it on as background noise and moved along at my MUCH slower pace, for a week, after which I will update about how my workout routine is going. I think that after two steady weeks of the same 10 minute workout,I will be ready to increase it to 15 minutes. For now, I am going VERY SLOWLY and at my own pace, because it's better to start off slow than not to start at all! Wish me luck in my workout journey! :)

P.S. It's about 15-20 minutes after my workout and I feel the need to note that I feel great, I feel like there was a boost of serotonin and energy and I am definitely looking forward to my next workout tomorrow! :D