Hello.
https://duckduckgo.com/?t=canonical&q=how+to+host+my+page+on+github&ia=web
On a serious note: your question is too broad. It is similar to a question “how do I make a dinner?” A lot of us are happy to help, but we need more information.
Steps I suggest:
- Create a page.
- Find some free hosting site.
- Read tutorial on how to set up your page.