Since your workflow is running on first list you can easily build the URL to display form of current item and use it in email. Follow the steps:
- Create a new workflow variable.
- Use the action
Set Workflow Variable
, select the newly create variable and now click on ...
to open string builder.
- In string builder put the URL to list item
display form
, append ?Id=
string to it.
- Now, from the lower left corner click on
Add or Change Lookup
.
- In this, select Current Item and ID and insert it.
It will look like following:
That's it. Use the same workflow variable in Send email body to create hyperlink. I am using relative URL in this example but you need to put absolute URL to display form, so that email will point to right URL.