Can I Build My Own Website

Maybe.  If you knew some code, and how it works together with other code. 

Then there’s the SEO (search engine optimization).  The ability to get your site’s information in front of consumers without paying for advertising.

Then there’s your list management.  Do you know how to set up a database to give you a way to capture the names and emails of customers who want more information?  Or you could simply outsource to an autoresponder service, but you would need to set that up and manage it as well.

My question to you is, even if you knew how to do the above things, would you want to?  Is that how your company would be best served?  Probably not.  Better to find someone who is on the same page as you are with where your business is, and where you want it go.  Then execute!