If you want to earn 0.1btc per week on this forum you just have to rank up you account and then join a good signiture campaign, as for now you can try and look for freelance jobs where you could provide servecices in exchnage of bitcoin , if you have some money you could always try trading , there plenty of trading sites that can earn you a lot of money not jut a week but for 5min and they start at a minimum of 5$