Free SSL

SSL Generator

https://punchsalad.com/ssl-certificate-generator/

https://manage.sslforfree.com/

guide for different servers

https://help.zerossl.com/hc/en-us/articles/360058295854-Installing-SSL-Certificate-on-Apache

How to import an SSL Certificate in Apache Server?

https://www.youtube.com/watch?v=Hw2IZkqG5_s

for me

SSLCertificateKeyFile /etc/ssl/sslbyadnan/private.key

SSLCertificateFile /etc/ssl/sslbyadnan/certificate.crt

SSLCACertificateFile /etc/ssl/sslbyadnan/ca-bundle.crt