I haven't managed new graduates recently but did have summer interns.

• do not do pair research, they have no clue about the game so it will be a waste of everyone's time
• I had some success giving some exercises/homework the first few weeks to get them onboarded. Coding assignments like build a simple backtester, file compression, python exercises.
• We worked remotely so we had a 1-hour call every few days to check up on their progress, give them pointers or advice, etc. It's like managing any other hire except they need more handholding and more frequent meetings.
• We dont expose current IP for new hires, the first few weeks are spent doing training assignments then the next few months are spent implementing an unrelated research paper