Have you got your products loaded onto Google Shopping?
Adwords can eat cash if you get the ads wrong, so I would recommend distiling the keywords to be very specific, set a campaign up and test test test. The Adwords Team are great at helping set up campaigns.
The best thing I can recommend is to really really understand your target customer and research what they search for and use only a handfull of keywords per campaign. Don't be hasty in deleting keywords as customers buy seasonally so what might work for winter will not work for summer, so pause a keyword if it worked well and then turn it back on when the season is right, if that is how your business works
Like everything else in SEO and Sales: - Prior Planning Prevents P* Poor Performance
Feel free to ask more about this...
Bruce