Tobe present In English and Afrikaans

Hello
Nothing ventured, nothing gained
Source: http://www.historyofpainters.com/austrian_proverbs.htm

English tobe present
(+) I am simple man
(-) I am not simple man
Am I simple man?

Anyone can help me to correct them into Afrikaans?
Were they already correct?
Afrikaans tobe present based on Google translate. https://translate.google.com

(+)Ek is 'n eenvoudige man
(-)Ek is nie 'n eenvoudige man nie
(?)Is ek 'n eenvoudige man?

Thank you
Trimong geunaseh (Acehnesse)