- Your website traffic is very low, first work on that. add quality question and answers.
- remove google search bar before applying, you are using ad free search bar, which is only approved for non-profit orgs.
- Remove other ads if you are using.
- Write terms and conditions page, privacy page
- add about and contact page
- Then apply for adsense account, they may approve.
Also read google adsense terms and conditions.