Ok, different scenario.
You are a trier, triers always succeed in business.
In the UK people who have gone bust trying to set up a new business are seen as failures, in the US they are triers, risk takers, guys who do not give up easily.
See yourself in this second category.
In using the internet, one tip - learn well the product you are selling, then devise your marketing using this knowledge, users intuitively will buy from a site that answers their questions without the need to ask.
AdSense is good, but get to understand the product and you will get to know the keywords, very soon the site will be on page one.