It is difficult to pin down how much training we got in WWII.
This guy seems to have done a lot of research on it.
https://www.reddit.com/r/AskHistorians/comments/7fwcvl/comment/du0n0zg/
I did a lot of research, too...and said same as him. A lot of my knowledge is first hand...from my uncles and my mom and dad.
By and large it was a lot, because the home front was a long way from the fighting, and we not desperate. But I had an uncle from West Texas who, on December 8, 1941, hitch hiked to the nearest town on the railroad, took a train to the nearest town large enough to have a Navy recruiter, and enlisted that afternoon. It would have taken him at least two days to reach California on the train -- the government did not buy recruits tickets on an express -- so he could not have begun training before December 11. He spent Christmas Day, 1941, on board a ship headed to Pearl Harbor.