if you do not have skills and if your web host does not provide support for Let's Encrypt, installing a Let's Encrypt certificate can be really tricky though. My web bost does not provide Let's Encrypto and I don't have the skills to enable it on my forums.Forum or website owners must make sure that their website have SSL certificate because it's one of most important security aspect of any website. I'm the kind of person that never uses any forum without SSL certificate. The good thing is that Let's Encrypt makes it easy for you to have it enabled on your websites free of charge.