This is something that I would recommend getting a developer involved with. You maybe able to find a theme close to what you have with your HTML site, but you still need under the WordPress plugins and setup.
I am a GoDaddy End User - Just Like You Check out my site! | I currently manage over 300 WordPress Websites * Please note that I offer free advice on this forum. If you would like personalized help, please contact me. Otherwise, please ask your question in the proper forum so the answer can assist EVERYONE in the community and not just you. Thanks! *
Once your issue is resolved, please be sure to come back and click accept for the solution