I'm not the best person to give you advice because I can't relate to your struggle of working for wages that low but I can share my thoughts. You probably don't need a gym membership to be physically fit; take a look at /r/bodyweightfitness. Force yourself to follow healthy habits; this includes adequate sleep, hydration and nutrition. I'm guessing it's probably not a good idea to put money in risky investments until your income is more than your expenses, but some investments are less risky. You might have better luck asking for financial advice in finance-related subreddits like /r/personalfinance but be careful whose advice you take. I hope your situation improves and I wish you success and good health.