How can I watch my created page in GitHub??
All I did is alright ?
Save the html and css files in the same folder then open the html file with your web browser.
Firsly, you can simply clone the repo on your local machine and open the HTML file in the browser.
Another option is using a feature called GitHub Project Pages, which lets you host static websites directly from your repo. To start using it, simply create new branch called ‘gh-pages’. Your site will be available under the address yourusername.github.io/projectname, which I’m guessing would be antontokar.github.io/my-portfolio in your case.