Steps to Upload a Profile Picture and or Cover Image to your Steemit account.

This really helped me alot

Step 1. Click your circle icon of your account on the top right corner

Step 2. Click Settings

Step 3. Open a new Tab and Go to http://postimg.org

Step 4 Click Choose Image and Upload your desired image

Step 5 Copy the second link titled "Direct Link"

Step 6 Go back to tab from Step 2 Paste "Direct Link" into either Cover Image URL or Profile Picture URL. Scroll to the Bottom and Click Update.