Both, SSL buying and renewal process are same. So you have to follow the basic steps that you already know to enable SSL certificate on your website. Let's Encr

Both, SSL buying and renewal process are same. So you have to follow the basic steps that you already know to enable SSL certificate on your website. Let's Encrypt has auto renewal process for domain validated certs but if you are looking for anything else like OV or EV, then you will have to go for other paid provider.