Starting from nothing and with no specific skills there are two real methods I can think of, one is to use faucets, I wouldn't do this as the payout is really not worth your time. The other is to participate in bounty campaigns within this forum, you'll in time earn alt coins which you can sell for btc, it'll require some time input and if you go for signature campaigns a little time spent growing your account but eventually you're effectively earning just for using the forum as you usually would. Once you've got some starting capital you can look in to trading/investing.