First of all, goodmornig to everyone and sorry for my english because its a little rusty.
As many users know, Hostinger does't support anymore the self install of SSL through SSH and have deprecated his own guide.
Searching for an alternative, i've used the service provided by https://www.sslforfree.com.
Since i haven't great IT skills, this solution is great but have a little issue: i've to manually renew the SSL.
So, i was trying to figure out how to use the CronJob function in Hostinger (from the deprecated guide at Do I Need an SSL Certificate? How SSL Can Protect Your Site)
You can also try to automatically renew Let’s Encrypt SSL certificate with a cron job. For example, in order to automatically renew SSL certificate, you can set cron job to run the following command every other month:
php acme-client/bin/acme issue --domains yourdomain.com:www.yourdomain.com --path /home/
With the SSLforFree service.
Again, i don't know how to do that but i think that it could be useful for most of the hostinger actual and future customers.
Thank you everyone for your help.