I'm 32 and recently over the last 3 months have made a successful workout habit at home after ~10 years of trying. I just do whatever I feel like doing now. I use to try to follow some program to the t, but could never follow through. Now I just youtube some random workout, wether it's with dumbbells, bodyweight, HIIT, yoga, going for a walk or whatever. It really doesn't matter for me anymore, as long as I'm doing something everyday even if its only for a short period of time.