Niche down to help a certain kind of client. Find out what serious problems you solve for them with your solutions. Don't talk about SEO or web design: you'll turn yourself into a commodity if you do. See this: https://www.jasonkanigan.org/what-to-do-if-you-are-a-commodity/
Can you explain a bit more about what you are doing? There are a number of established ad servers, but I am unclear on how you are going to work with them to provide a service that is not already provided.
Start by interviewing people who do have experience in the field and determining to what extent they feel the pain for the problem you're solving. Your biggest risk with an idea where you don't have domain expertise in is that you're solving a problem that doesn't need solving. If after speakin...