To do it in steemit you go to the community page: https://steemit.com/trending/hive-170798

and hit the 'new post' button near to the top right of the page(see screenshot below).

Then when you have hit 'new post' a post writing screen will pop up and you can input your posts markdown, title and tags:

You see how it says posting to The Ink Well at the top left? That means it is posting to our community, and ignore the bit on the top right that says 'post to blog' if you click that it won't post to The Ink Well community. Once you have copied your post html/markdown writing etc into that window and hit post at the bottom, it should show up in The Ink Well.

Then the final step is to find your post in the ink well community and resteem it so that it shows up on your blog as well :)

Hope this helps,
@raj808 answering from the community account.

P.s. if you do use steempeak it's even simpler and just let me know and I'll show you how to do it using steempeak with screenshots etc :)