Keyword question

I have my keyword. It's will be easy to get the 1st place in google
But, when someone will search it, the first thing that he will see is the google shopping photos with this product. so even if I am in the first place, someone is before me. is it still worth to go for it? it's 15,000 searchs monthly

Describe your website easily and friendly to the visitors

Yeah you have the product site go for sitewide links.
Also use rich snippet in your perma link it would help you.