Need help with my HTML file to start a website. I made a single page website using Dreamweaver and I'm trying to eliminate the use of lt;divgt;

Need help with my HTML file to start a website. I made a single page website using Dreamweaver and I'm trying to eliminate the use of <div> tags and replace them with HTML 5 semantic tags while still keeping my CSS code functioning. Any help is greatly appreciated.

HTML file is located in the link at the bottom. Thanks in advance.

https://files.fm/u/cqmn2mpf