For English translation, maybe "I do not have a job" is better than "I do not have a trade" (current one)
So could we decide if this is about an unemployed (no job) or an unskilled (no profession/trade) person?
The current Duolingo sentence is about an unskilled person, i.e. one which does not have a profession/trade.
We would normally express "I do not have a job" as either "Eu nu am o slujbă" or "Eu nu am un serviciu".