I know this is several weeks later, but wanted to offer my two cents, having attempted multiple programs before, as well. Pay attention to your level of fitness. There are programs that are add-ons, as has been mentioned - specifically Vitality and Baseline, which are two I have done together - and which are considered Level 1 difficulty on a scale of 5, 5 being the hardest. Even if you're not a stranger to exercise, still pay attention to your level of fitness. I had been no stranger to exercise, but I tried two Level 5 programs at the same time and failed. Burned myself out because I was still at fitness level 1. I even tried five programs of various levels of difficulty at the same time including a couple Level 5 difficulty programs. Burned out by day three. I told myself I could do it and was motivated, that I had the willpower. Didn't matter. I was still too low of a fitness level to pull it off. I had eaten with my eyes instead of my stomach, as it were. There are so many fun things to do, but all in moderation.
As
@Kanary said, it is doable, but my two cents is pay attention to your fitness level when choosing what to add and all in moderation.