Thanks for trying out FormMagic.
To get several lines in a field, you have to select the form field in InDesign, and, in the Buttons and Forms panel, check the “Multiline” option (a small checkbox at the bottom-right).
In your case I woiuld also recommend unchecking the “Scrollable” option, just below it.
You’ll need to play around in Acrobat to find what the best point size is, though. And unfortunately there is no way of controlling the leading between the lines with multiline fields. If that is important you would need to consider creating 3 separate fields in InDesign, 1 per line.
Regarding the font: What font exactly is this, and what weight? Sometimes, FormMagic needs some “help” figuring out the correct PDF-name of the font. This only needs to be done once, and the process is described here: https://www.id-extras.com/help/formmagic/#:~:text=Advanced%3A%20Using%20the%20FontList.txt%20File
I hope that helps. If you’re still not managing, perhaps you could send me the InDesign file with the fonts and I will see if I can get it to work.