There are two ways how you earn money from your blog:
1. You can use our recently released Subscription plans. Read more about it here: https://www.wix-blog-community.com/blog/updates/new-earn-money-from-your-blog-with-subscriptions
2. Add Google Adsense ads to your blogposts. Learn how to do it here: https://support.wix.com/en/article/adding-google-adsense-ads-to-blog-posts-in-the-new-wix-blog
Let me know if you have any more questions.