I'm confused on what keywords to go with and what niche to pick because I'm not sure weather to go for high medium or low competition. If I choose a niche with keywords with high competition, then chances are the SERP will most likely be in the 10's of millions. however, the higher competition keywords generally have higher CPC, granted you can even get any decent traffic to your site. On the other hand, lower competition keywords (from what iv'e observed) make it easier to rank faster to the the first page due to lower SERP and less overall competition niche sites.
Which is the best route to take? Right now I am working on a niche site that when you type in keywords you get a SERP in the 20 millions BUT cpc for this niche is very high... does this make it near impossible to rank in the first few pages? I mean jesus, there's 20 million other competitors.. Am I getting this right? still relatively new to IM, trying to gather all beneficial info..