You should go to appearance > theme options > blog > you can customize blog layout.
Also, you can go to appearance > theme options > main slider > you can customize your slider as well.
I just chose your blog page as front page and cleared cache.
Hello! I am also having this same issue :) I’m gone into theme ––-> customize but there is no option to change the blog or homepage format! Can you please let me know how to fix this? I feel like I didn’t install everything properly. My About Me also doesn’t look like the demo!