Life in third-world country is complicated, mate. If I could go back to when I was 12 or 13 and some people offered me 10-20 USD for a couple of hours sitting in a coffee, doing some non-against the law light work
I have worked for that kind of money from 15 to 18 yr. teaching math, physics and English to others. Perhaps the key is that I decided to do it because I wanted and I was not living in a third world country at all. Should I have found about a forum like this at that age... I would have put 5 hours + a day
