Open the “My Websites” section in your mssg.me personal account, you can go to this section by clicking here
Click on one of the created sites
Open the “Edit” section
Click on the “+” button located at the bottom of the page
Click on the block you want to add to the website
Fill in the required fields of the block and select options for its display on the website
Click on the “Add” button in the upper right corner of the block editing window
For most blocks, at the top of the editing window, you can see how the block will look on the website after add it.