While there are multiple ways to leave a comment on my blog (nerds: webmentions), the easiest way is to do so in micro.blog. Simply create an account (you can choose the free option), find me, and click the reply button.
You can also download a varity of micro.blog apps for iPhone and Android, login to those apps (with your created account), and follow @mtt. From there, you should be able to reply with ease.