None of this is going to work while you're repo is in private though, silly dev!!!
Visit here to view: https://htmlpreview.github.io/?https://github.com/EddieSavageOG/DOandBeMarketingPlanCalc/blob/main/index.html
use this code to embed:
<iframe src ="https://htmlpreview.github.io/?https://github.com/EddieSavageOG/DOandBeMarketingPlanCalc/blob/main/index.html" width="900" height="650" allow="fullscreen"></iframe>