Expired Web 2.0 and my new website, i need your advices

i have a new website ( 45 days ), and i have some expired web 2.0 ( tumblr, weebly , over-blog .. etc ) with very good metrics .. mywebsite is dancing now between #10 and #25

my question is : if i write some good content on these expired web 2.0 and put a backlink for my monysite ( ofcourse with different anchor text and links ) is this normal to google? or i will get penalized because my website is new??

another question : can i work only on this strategy to rank #1 ?? Especially my…

Expired Web 2.0 and my new website, i need your advices