Was your website created with a specific strategy & plan in place? Or was it just thrown up because you knew you needed to have something? What is the purpose of your website? Is it to inform, sell, both? Often the sales part is missing from a website or incomplete. Your website should be your 24/7 sales person. If it's not bringing in leads & sales, then it's not serving its function.
Creatives especially are often afraid of being "too salesy" or just don't know how to craft a sales page. This isn't knowledge that everyone naturally has. Unless you've studied it, you wouldn't know. There's a lot of science & information out there. This is the main reason it's a good idea to hire someone to do this work for you—so you can spend your time doing what you do best.