How to Add Search Bar to Right Side of Header Text?

I simply want to add a search bar so people can search for my woocommerce products. I clicked on Appearance-Editor-Home page. Then I selected  my header text and I was told to select Edit Template so I did. But I do NOT see a "+" sign to the right of the header text allowing me to add a block and then a search bar. And will a standard search bar allow people to search for my products? www.mytestsite3.site