When using Hostinger Website Builder to create your website, you don't need to worry about SSL configuration or renewal at all.
It's because every builder-based website has a lifetime Let's Encrypt SSL certificate integrated by default and is as secure as possible 🔒
The SSL is automatically activated once you connect a domain to your website (the domain must be pointed to Hostinger servers) and publish your website. So, make sure that:
Your domain is connected to your website
Your website has been published
And that's all it takes!