First go to blog and click on my blog. It give a list of blog posted by the logged person. Refer Fig 1
Note:- Blog operation edit, delete ou unpublish of a blog can be done by the person who did the blogging.
- At the top of your dashboard,
click the module access icon > Collaboration> blog> My blog
- Perform the Edit,Delete and Unpublish to perform the editing, deleting and un-publishing the blog post
For more information, watch this-