How do I complete a 1099-MISC for 2019 to one independent contractor ?

Handwritten forms are allowed (unless they exceed a certain number) so for one 1099-MISC you will be fine.

However, you do need the properly formatted (official) forms which you can get from directly from the IRS at the link below (i.e., you cannot just make copies of the forms from a file).

https://www.irs.gov/businesses/online-ordering-for-information-returns-and-employer-returns