What does 'get my feet wet' mean?

[Saneta]

English Language Tests, Intermediate level

ESL/EFL Test #280 "English Slang Idioms (2)", question 4

Most bosses won't send you out on a job until you get your feet ..........

(a) dry
(b) wet
(c) green
(d) hot

English Language Tests, Intermediate level

ESL/EFL Test #280 "English Slang Idioms (2)", answer 4

Most bosses won't send you out on a job until you get your feet wet.

Correct answer: (b) wet

Your answer was: incorrect
Most bosses won't send you out on a job until you get your feet hot.
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get your feet wet? - being more prepared/ready? thanks!

[Linda]

Hi Saneta,
When you "get your feet wet," you gain experience or become involved in something.
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