I think the biggest hits your going to get are off your own promotion and you own brand awareness. I'll put a few links up to your website from a few of my websites using the term 'jessicas jams' - you'll soon be number one (not cos of my efforts obviously but I would like to help).
I think that its such a niche market you wont need google adwords to promote yourself - although the competition is really low in the adwords market - or at least in the areas that I can see your website is selling.
What you need to do is expand the page numbers on your site. Now you have the template - replicate your pages and make many pages - each page about your individual products, work on getting backlinks from other sites (ie write to them and ask them to link to you, use an article writer to publish articles on google news aggregated sites, get websites to link to you because of unique products or services) - this will help you climb the serps (search engine results pages). Free traffic is better than paid traffic - cos it dont cost anything.
Use this tool (
https://adwords.google.co.uk/select/KeywordToolExternal) to decipher exactly what are the most searched for products and services that you produce - target those phrases or keyword combinations in your page -1.) Headings 2.) Page titles 3.) onPage content (but dont over spam - prob 3-4 times with the phrase in any one page is not overdoing it).
Your going to need at least 300 words of unique text on every page you create to stop it being binned (google is petty) - it has to be unique (google can tell if you copy) and it has to be well written (google knows spelling)
If you do want to go for adwords still - gis us a shout and I am pretty sure I can get you a free £free voucher to try it out.
If what you are talking about is adsense - ie the ability to put ads on your site and earn money then thats a different branch of google and is just as easy to install on your website - gis a shout and I'll guide you through.
Baz