First impression is the last impression. I do not agree with the statement. However, I do agree when there are multiple competitors for your product. You never get a chance to make a second first impression.
Homepage of a website is like a virtual front door of a company. If you don’t like it, I’m pretty sure you hit the back button. Obviously that’s not true for all the websites. A lot of people hit the back button when they enter a website, that’s why we have a term called bounce rate.
If you are not Amazon, Google, YouTube etc. How can you make sure people don’t press that back button? What makes someone stay on your website? What would make people click on the contact us button?
People should able to understand what your website is all about. Let people know about the advantages of visiting your website.