How to make Comments?

You'll want an intermediary or backend language; you have to store the comments somewhere (generally, a database). You could use PHP (typically with MySQL as a database), Node (typically with MongoDB), or any number of other popular languages. Treehouse has several courses on both PHP and Node that would be really useful to you in this regard.

As far as snippets, you could certainly search the web and find plenty of code snippets from other people to use. However, bear in mind there is significant risk (both to you and your users) of using someone else's code that you don't fully understand. How do you know they aren't sending or stealing the data? How do you know they aren't accessing your server or worse? How do you know they aren't downloading malicious files to your users (which you would be responsible for, as it's your website)?

Blogs are pretty fun to build (and relatively straightforward so far as first projects go) - would definitely encourage you to look at some of the Treehouse courses on Node or PHP. After taking those courses you should have the knowledge you need to build your blog as you see fit (without needing to get snippets - or at the least being able to understand the code you're copying).

Thank you so much! I will look into courses and snippets. I really appreciate your help. Thanks again!