A family of Microsoft word processing software products for creating web, email, and print documents.
If you have been reading about Content Controls, then it's best to use a Windows computer to create the form. It's possible to insert Content Controls using VBA on a Mac, but they aren't as editable after insertion as the same controls in Windows.
Using the legacy form controls in Word for Mac that are visible in your screen shot, it's possible to create most types of fillable forms. Their advantage is that the forms will work on any version of Word. Content Controls will not work on Word 2008 or 2011 for Mac. Here is Microsoft's help page on this subject: Create forms that users complete or print in Word for Mac