Here are a couple of threads I found through a quick google:
https://www.preplounge.com/en/consulting-forum/how-would-you-prepare-for-a-full-time-position-for-bgc-724
https://www.preplounge.com/en/consulting-forum/very-new-at-mbb-stressing-over-learning-curve-how-long-till-you-know-your-way-around-3058
