My blog post is alinged to the centre and i want it alinged to the Left

so whenever I upload a blog post it appears at the center of the page. so all my blog post are aligned to the center and I don’t like it this way. I want them starting from the left or justified.. view my blog to see what I am trying to say.. I want my blog post aligned to the left and not Centre
https://www.talkcityonline.com/

The page I need help with: [log in to see the link]