i studied banking and finance and joined SCB when i graduated. Didn't have much problems setting in etc. I was a pretty fast learner and adapter. Nevertheless after that, I have joined other places where it was more difficult to fit in and cope etc.

My advise is to speak to your direct supervisor and get his frank advice or appraisal on how he finds your performance for the past 3 months, what you can do to improve etc. Example that report you did? Maybe read similar reports from other colleagues etc on the right way it should be written etc.

About who to CC etc, keep a notebook and just record for emails about X subject - cc who and who and who etc.