HI
Well, searching alone isn't going to show you how much competition a keyword has. Your best bet is to look at the search results to see how optimized the top ranking site for your keywords is. This will show you how hard you're going to have to work to get to the top.

Then you can look at how optimized the site at the 9th or 10th position is. This'll tell you how hard it's going to be to break into the first page. When you're looking at your competitors, it's important to look at both on-page and off-page factors. In my opinion, off-page factors (link count, relevancy, anchor text etc.) hold more weight.