To make your first blogpost on your WordPress website, login to your WordPress dashboard and proceed as follows:

• From the left side, select Posts.
• Click on Add New.
• In the next screen, add the title and content of your post in the appropriate boxes.
• Use Editing tools from the toolbar for proper formatting.
• Click on Preview button located on right side top to see a preview of the blogpost.
• Click on Publish and the blogpost gets published on your website.

(During this process, keep clicking on Save Draft button at regular intervals to save your work)