need help with the forms

hello everyone. im applying for a visascreen certificate by myself and im not quite sure on how to go about it. i've read the handbook already.:typing

for those items on the forms that are not applicable to me, do i leave them blank or write NA?

one item goes like this: i worked in ________ as a ______ for _______ years. if, in my case, my experience is yet to reach one year, do i write 0 years?

you can either leave them blank or put N/A

If you have some nursing experience you could but less than 1 year or 0