U.S. Army Combat Engineer Officers - Commissioning to EBOLC Transition

Army Combat Engineer Officer Day-to-Day I'm researching the career path of a U.S. Army Engineer Officer for a story, and I'm trying to make sure I understand the transition from commissioning to becoming a junior Engineer Officer correctly. I have already looked into the Army's official information, but I'm still unclear about some practical details: After an officer is commissioned and receives Engineer Branch, what does the transition to their initial Engineer training normally look like? For a newly commissioned 2LT assigned to the Engineer Branch, what would typically happen between commissioning and reporting to EBOLC? If a candidate fails a required part of their commissioning/OCS process, what are the usual consequences? Does it normally mean dismissal from the program, remediation/retesting, or can the outcome vary depending on what they failed? Once a new Engineer 2LT arrives at their first unit after EBOLC, what would their first few days normally involve before they begin functioning as a platoon leader?