Cracking post marra. Can't recommend exercise of any sort enough
@ChrisAshley mate. Transformation doesn't happen overnight but your self confidence will sky rocket and better things will come of that.
Instead of running away from your problems try something as simple as this first. Put it this way mate, the next 6 months are going to go past anyway, you can either choose to spend them sitting around overthinking and putting yourself in a bad place or you can dedicate it to this and see where you end up. What's to lose here, it's win-win?
Make a promise to yourself that you will go to the gym 3-4 times a week, get on the D&E forum for any tips, questions you might have and track your progress. Write down how you feel after sessions, set little weekly targets or goals to achieve and write down how you feel when you hit them. Diarise all this so you can look back on it and then do something like take a photo now and then one in 6 months to see how far you've gone and how much you've achieved.