Go to Pages on the sidebar. Click on About page to edit it.
Edit 2 column content section
Scroll down to Content Sections editor to edit the content in 2 column text section.
Click Update under Publish panel to save the changes
Edit Image & Content section
Scroll down to Content Sections editor to edit the content in Image left, text box right section.
You can remove the current image and upload a new image.
Image dimension: 435 x 475 px
Click Update under Publish panel to save the changes
Edit Quote section
Scroll down to Content Sections editor to edit the content in Quote with borders section.
Click Update under Publish panel to save the changes