the simplest way is to visits bitcointalk.org then visit services there search for signature campaign who accept bitcoin for your rank. hope that you will be accepted in the signature campaign and hope to earn a good amount of bitcoin.
Yes Services section is good way to see offered task for Bitcoin, but i don't think joining Signature Campaign will fullfil his wish of 2 Bitcoin earning per week. So i think he really need some serious investment here, and a serious business model, even trading can\t guarantee that 2 BTC profit per week even if you hold 10 BtC as initial investment .