HOW to change the initial input files?

I am a beginner using the sea air coupling mode of Nemo and Speed. During use, I am not sure how to change the initial field file of the Nemo module. I would like to inquire where I can obtain the initial field file in ORCA2 grid format.
At the same time, when I tried to restart the coupling mode, if I ran it for a year and then restarted it, I could run it again. However, when I only ran it for a month and then restarted the mode, the program would freeze and not prompt any error messages, only displaying a normal interface.
thanks

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