TLD types

Hello folks.

I'm between contracts at the moment and whilst looking for something else I started to ask myself if there was anything else out there that I could do. My girlfriend mentioned that she'd looked into IM a few years ago when she was without work and that she regrets not having looked into it further. Since then, I've spent the last month reading as much of the free information on the internet as I can get my hands on (and that I can commit to memory without exploding). There's a huge amount out there to be read and now I'd like to put what I think I know into action. I've been dabbling with the Flexibility theme on WordPress for a bit and whilst the whole thing was a nightmare at first, I've got it laid out the way I'd like. Having never touched WordPress before so it was a little bit of a challenge in itself. I have found a single item, on Amazon, which I would like to promote. It doesn't have a very high search rate according to Google's Keyword Tool, only 500 searches per month, but so far it is the only thing I have managed to find over the last few days that has a high purchase percentage, is a recent item, and it is around $150. I'm quite excited by the whole thing so have decided to try this as my first project despite it's fairly low interest.

I would like to ask, do you consider this a hasty move and do you think I should perhaps look into an item that has a greater search volume?

At the moment I've been using a free hosting site, just for the purpose of dabbling with WordPress/Flexibility3. I have it laid out pretty much how I'd like it and have found some plugins, one that excludes pages from being navigatable (if that's a word), SEO slugs, and Headspace. Headspace is giving me some issues as it turns out optimising a WordPress site is far more tricky than working with a static website page. Or at least in my opinion.

Once I have my review ironed out, I wish to publish it via a WordPress site on a domain that I have my eye on. Whilst I am trying to keep costs to a minimum, do you think it a bad idea to use a .info domain for this site? Does it have less of an impact with people than a .com? As this is my first venue into the unknown, I would rather keep costs down, albeit it's not exactly expensive to use a .com, but I'd like to know your opinions as to whether it's actually better to use a full fat .com domain. I ask, not because I see this as a 'just have a go' idea, but would generally like to know whether it matters. It makes no sense to use a more expensive domain than is needed. As I type this, I can almost hear people saying to go with a .com domain rather than a cheap .info one, but I'm not sure if that's just how I think personally, or if there's any commercial sense in it. If you see what I mean.

One last question if I may. I have only found a single item to promote at the moment and it's entirely possible that the next item I find will be in no way related to the first. Is it a bad idea to use the same website for both, and potentially more items? Does it depend on how I've set up the site and it's domain name? I'm guessing it does because I can't have a hard hitting cee oh emm site with the product name in front if it also features another product. What is the importance of a keyword being part of the domain name, as opposed to the relative URL? Is "cee oh em oreye en eff oh" better than "cee oh emm" with rhubarb in front of it?

Does that make sense?

(I've had to edit the URL's because they will not allow me to post them. "cm" should be c0m)

(The domain extensions may look cryptic, apologies, it's the best I could come up with)

Thank you.