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$
No signature campaign can earn someone around 0.1 btc in a week, if that was possible then no one would have been doing anything else as someone could earn 0.4 btc in a month just by signature campaigns which is a really good income i guess, though earning through freelance jobs can get you an amount like that easily in a month.