Trouble pasting text into Adobe Acrobat

I am filling out a form in Acrobat for Mac. I had to compose a text in Mac's NOTES (because I am disable and the voice command would not work in the "Fill" mode in Acrobat. After composing the text, I copied and pasted the text to the space where I needed it to appear in the PDF. The text ran off the page. So, I tried positioning the cursor at points to add a hard return (hell, for someone with poor motor skills). Matters got worse because as I tried to move the cursor to the correct placement in the text to add a hard return, the program would freeze and the "Force Quit Applicartions" of my Mac indicated that Acrobat was no longer responding. I have an iMac with a 3.6h 8-core intel core i9 processor with 64 GB of memory and a two TB hard drive. 

Why is this not working properly? And, more importantly, what can I do to resolve this problem. I need to send a PDF federal form, and I cannot finish placing hard returns in the document. Acrobat has frozen uo.