How to get a certificate

@schoen my web host provider is arvixe, i looked through the list of host providers that support Lets Encrypt i did nit see thier name but on my cpanel i saw a provision for importing certificate. i think they would allow for third party certificate. but my problem is; how can i get the certificate and how can i get the cerbot?

when i checked the Let’s Encrypt website i saw some brief explanations like “If your hosting provider doesn’t want to integrate Let’s Encrypt, but does support uploading custom certificates, you can install Certbot on your own computer and use it in manual mode.”

then i looked for how i can get certbot i saw a page where i can select my ‘software’ and 'system’
after i made my selections i saw this ’ Get Started
If you have administrative shell access to your webserver and you’re comfortable running commands on the command line, please select your server software and the operating system it is running from the dropdown menu above. If you don’t have these privileges on your webserver or you’re not familiar with command line server administration, Certbot probably isn’t the best option to enable HTTPS on your site. Instead, you should check if your hosting provider has built-in Let’s Encrypt support by contacting them or checking this list of supporting providers.

If your hosting provider doesn’t provide built-in Let’s Encrypt support, you should ask them to add it! Dozens of providers, with millions of customers, conveniently allow their users to obtain Let’s Encrypt certificates automatically. Let’s Encrypt works hard to make adding this support as easy possible and it is one of the easiest and best ways for users to increase the security of their websites.’ to be honest it looked like a dead end. please i need help