Hi Karina,
to create a cell custom template you can see this following article https://my.webratio.com/learn/learningobject/getting-started-with-the-cell-templates-v-72.
To integrate two components, as Simple List component and Form component, in the Layout View you need to select both components -> right-click on them -> choose "Refactor" -> "Surround with Cell". In this way the components are included in a cell, on which apply the template you are going to create..
Another example that you can see is the "WRDefault/Index_Editing" cell template. To see how works, apply it by selecting in the Layout View the cell, move to the Properties View and choose this template in the "Cell Layout" property.
If you have an example found over the internet that shows the structure of the page that you want to obtain, you can see this article https://my.webratio.com/learn/learningobject/create-a-style-project-from-a-mockup-v-72 that explain how you can create a template based on an example.
Best regards