[Need help / suggestion] On micro niche adsense website ranking

hi,
i am new in micro niche website creation, my main motive is to increase my adsense revenue with this website. i created
website on pet niche and my keyword is EMD which having exact local monthly searches of 5400 and global monthly searches of 6600
adword competition is high with cpc of $2.00.


1. overall pr competition = 1.9


2. keyword in "" having = 344000 result


3. keyword inurl:"" = 10300 result


4. keyword intitle:"" = 121100 result


5. combining inurl and intitle got = 5620 result


i made live this website on 14 july till now posted 3 well written articles, site got indexed but not in top 100 for its main keyword
now my question is this keyword easily to rank or not? what seo work i have to do to rank it on 1st page?


planning to mix white hat and black hat seo method on this site.


what i have done in seo till now for this site


1) tier 1 -- 8 web 2.0 website linking to main site


2) tier 2-- 50 web 2.0 website linking to tier 1


3) wiki links and blog comment on that tier 2


4) 15 hig pr bookmarking direct to main site


5) 500+ social signal twitter, G+, stumbleupon and everything in drip feed mode.


what else i have to do to rank it fast all seo and micro niche expert suggestion welcome

Any one ??

Try creating some some .edu and .gov authority backlinks, they help a lot as well.