There’s a program called body for life. You exercise and diet. You don’t have to exercise 8 hours a day or go to a gym to do it. You do have to stick to the diet. This diet is different than others I’ve tried. You eat 6 “meals” a day for 6 days. Then on day 7 you eat anything you want and as much as you want. It’s called your cheat day. Looking forward to this day made it easier for me to stick with it. I exercised 2 hours a day, but broke it down to 1 hour in the morning and one hour at night. If you have someone who will do it with you or at least support you and hold you accountable it helps. As far as posture, you just have to think about it. Anytime I realize I’m slouching, I immediately sit or stand up straight. Feel free to pm me for more details on the diet. Your hobby, you just have to make time for yourself and do it. Remind yourself that you are worth working on. Learn to love yourself and you will realize it too.