Get your feet wet

The cat would eat fish, but would not wet her feet. -early 13th

I stepped in the hallway and my feet got wet.

He's a little wet behind the ears

If you jump in and get your feet wet, there's no turning back.

I am just happy to get my feet wet. I just need some reps to get better and Coach Fisher has my back 100 percent. I am just letting one game come at a time. I know when he puts me back there to return, I'll be ready.