Steps to  know Your blog is eligible for AdSense:

• Visit the Adsense Eligibility Checker.
• Add your website's URL to the Site URL field. Make sure your site's URL includes https:// or http://.
• Select 'SCAN' from the drop-down menu.
• This is a fantastic and useful tool for Adsense or SEO businesses, as well as blogs who wish to make money with Google Adsense.
• Your website must feature at least 20 unique and intriguing pieces of content.
• A top-level domain, such as.com,.net, or.org, must be used for your website. (List of top-level domains)
• Your website's age must be greater than six months.
• Your article should be at least 1,000 words long and related to your blog's subject.
• Regular and consistent publication of articles is required.
• You need SEARCH ENGINE OPTIMIZE your website. (In other words, do correct SEO.) 

Read More : How much content does a Blogger blog need to have in order to qualify for AdSense?