You should be able to type in any word that starts with S for the first round. Here’s an example of how to chain the words

This is from yesterday but should give you the idea - you build off the end of each word, the more letters you overlap, the more points you get!

You start with the end of the word, like this example. The more the words overlap, the more points you get. Overlay a letter into three words and get a bonus yellow tile.