Not being indexed by google

My blog is not being indexed for a really long time. I think sitemap.xml may be the reason for it (If there are other issues, please let me know). I’m quite new to this. How can i configure it? Google Search console says couldn’t fetch. I’m opening this thread as this is closed. I’m using ghost with Github Pages. My URL is https://prajjwal1.github.io
I’m using Ghost > 1.0

8 posts were merged into an existing topic: Best way to setup ghost with Github pages