Need help,rank 7 on yahoo.

I started backlinking a few days ago,My site is a blogspot,18 backlinks indexed by yahoo site explorer so far,i've done around 150 backlinks or so..It is ranking only on yahoo and bing,google not yet I don't know why.The keyword has around 74,000 searches and am ranking on the first page as rank 7 and for another two keywords with also around 74,000 searches each rank 10,My competition has around 511 backlinks to the main page and around 2100 total backlinks,I use mainly blog commenting on do follow,auto approve blogs with pr 3 and higher.

How can I rank first from here?How to get my backlinks indexed in yahoo site explorer faster?And how to rank on google and how to beat all my competition?

Any advice is appreciated!

You have alot more reading to do.

Yahoo Bing and Google all have different timing regarding indexing backlinks. Just because Site explorer or Google "link:yoursite.com" doesnt have any links listed, it does not mean they did not notice them yet. Indexing your backlinks takes time and you should note that it does take time to get them backlinked or noticed. It all depends on several key factors such as Search Engine Crawlers (how often they visit your commented page), your site popularity or how often they crawl your site, how new your site is, etc...

Google I noticed tends to be the slowest at "indexing" the backlinks, but you can find all your backlinks at Google Webmaster (add your site, look into linking stats). For example one of my sites has over 190k backlinks on webmaster tools but when I type in link:mysite.com It lists only 3 sites. The way to get your backlinks indexed faster is to backlink your backlinks.