PSA in case anyone doesn't know this: the built-in Preview app on MacOS can be used to fill in any PDF form. You can type into text boxes on some forms. But even if they're not there, you can add text anywhere on a pdf. You just have to drag your own text boxes to wherever you want to type. It also supports signatures and various shapes.
The options are sort of hidden - View -> "Show Annotation Toolbar" or Tools -> Annotate -> Text.
You shouldn't ever need adobe acrobat.
