First you create the template, as you've done.
Then you need to create a list of recipients, which you do via 'Send Bulk Emails'. That will generate a list based on the filter you use. Let it generate the list then it'll tell you how many recipients were added, and hit 'Continue'.
The next page shows you the list of recipients. Again, click Continue. Now it will ask you which template you want to use.
At this point you probably want to select the template you just created. Check it, hit continue.
From here you should be able to figure out the rest.