Today i found something interesting. If you are running a webserver privatly you can use a free tool named Certbot to automatically get a certificate created by Let’s Encrypt.
To quote there own website:
Certbot is a free, open source software tool for automatically using Let’s Encrypt certificates on manually-administrated websites to enable HTTPS.
Certbot is made by the Electronic Frontier Foundation (EFF), a 501(c)3 nonprofit based in San Francisco, CA, that defends digital privacy, free speech, and innovation.
look it up at https://certbot.eff.org/