Affiliate Marketing Secrets

I have roughly about 7 keywords I would like to rank for, I have checked all with exact search on google keyword tool, they all say low competition, and all 7 keywords only get searched about 40 times each per month.
My domain is 2 worded and contains parts of both keywords.
If I set up a blog, how easy should it be to rank for these, its very niche, and how would I best go ranking for each keyword, like would a quality 1000 word article on each be enough.
Any advice please appreciated.

I would like to optimize my website using appropriate keywords that best suit my niche but I am not familiar in keyword research. I’ve tried to use Google keyword tool but I am having a hard time selecting the right keyword because there are lots of information shown. So please! Can anyone give me some tips and suggestions on how to find the perfect keyword for my site? The niche of my site is about love and relationship. If you can provide various other reference, that’ll be much appreciated.

im making a blog. im new to blogging and confused. i am using the adowrds keyword tool to research my niche. i have a blog made with 6 pages of content. i picked out some of my keywords and plugged them into the keyword tool and found they have a nice cpc value, high search volume, and low competition. so now what do i do now? i see infot hat says you have to pay adwords but is that only if you are the compnay selling the products? i am just looking to advertise for others, not myself. i do not offer and product or service so i would not be paying right?
i see some sites where you set a price per click? what is that for? is that the price you will be paid or the price others will be paid? im so lost.
what do i do with the adwords code? is that for use when i type a sentence and insert the code for a link reference from a word in the sentence so its highlighted someway and when clicked the user will be directed to whatever site is advertising? ?