Yes, there is an easy way to copy it all:
Hold down CTRL key + press A key
This will "select all" of the text within the box
Hold down CTRL + press C key
That will "Copy" everything selected

Now you'll want to go into Steemit in your browser, then click the POST button. You can enter your title there in the title box.

Then click the big empty text box until you see the cursor - now you're ready to paste everything in there.

Hold down CTRL key + press V key
This will paste everything in that we formatted.

The last thing you'll do is add the TAGS in the bottom text box - ONLY lowercase letters are accepted and I'll edit this comment with some TAG suggestions that you can select, copy and paste in there.

Let me know if you have any problems and I'll do my best to troubleshoot. Will edit with tags below:
{update/edit}
I have found these existing tags on steemit that you can use (copy+paste right into the TAG box below (foot of) the post text:
life story live love writing