Github multiple pages troubles

Having troubles putting multiple pages on my website

First page is

This is my first page

About Me

Second page is

It brings me to the second page but any html I put in just shows up as Example I don’t know really how else to explain it but nothing actually shows up no matter what.

I’m doing all this without applying one of the Jekyll themes if I do apply a theme the second page doesn’t even work.

If someone could link me to a step by step video or guide of this that’d be awesome. I’m really new to all this sorry.