Try to eat well. I had no 'dietary education' from my family (basically it was an "eat what you like, when you like") and at 44 I fiscally felt so bad that I went to my doctor saying "I need to be checked as I think I have something really bad". I went through a number of checks and I was fine. This was also worsened as I am not obese, so I did not connect in a first instance my feeling bad with my eating habits. I decided to loose some weight and I put myself on a quite silly diet since few months now. I am eating mon-fri one time every 24 hours. Basically I have a meal a day (a dinner) and any junk food or sweet has been banned. I have lost weight (and I'm still loosing about 800/1000 grams per week) and I feel great now. My second advice is to pick a job which aligns with the things you enjoy doing. This will not necessarily lead to money, but still you will enjoy it. Consider we work the majority of our time.