What is a Metaphor for "Being Thrown Into a Completely New Environment" [closed]

Solution 1:

You could say...

• It was a baptism of fire.
• I was thrown in at the deep end.

There's also a phrase, sink or swim, which means roughly the same thing.

Solution 2:

A metaphor for "to be thrown into a completely new environment", I would suggest

• "to feel like a fish out of water"

to feel awkward because you are not familiar with a situation or because you are very different from the people around you.

"All the other children in the school had rich, middle-class parents, and she was beginning to feel like a fish out of water." The Free Dictionary

Solution 3:

In Australia, there's "Thrown in at the deep end", meaning someone being thrown into the deep end of a pool, and having to learn to swim rather suddenly because they can't just stand on the bottom of the pool and still breathe.

I don't know if it's used outside Australia.