I may need a screenshot to properly understand your question, but if you give your group a data type of contacts, you should be able to use the workflow action Group > Display data to pass the first contact record to the group. Each of your fields would then reference the parent group’s contact - e.g. parent group’s contact’s name/email etc.
No, you don’t have to send each field - just the record you want to send - in this case the first record. Select Do a search for, put in your constraints, sort the results if necessary and then add :first item