Let me first mention that some of this is not for the DIY type. There’s just too much involved that you as a site owner are not going to know (like filling out the details for what is called your Certificate Signing Request) That said, you can still do this, you just need the help of your hosting company.
So instead of me giving you a list of places to buy your SSL Cert I’ll just refer you to your hosting company. You’ll simply want to ask them for a Domain Validation SSL. They’ll probably give you a link in their system to order/buy the SSL Cert.
Once that order is placed and the SSL Cert is issued the hosting company will need to install it on your account. Once again, this is yet another reason you can’t DIY this.
Posted in: HTTPS, SSL and making your site Secure