I am used to using the pycom micropython boards, where I can interactively code via the REPL. Is this not possible on the OpenMV?
There is a serail terminal in OpenMV IDE if you go to tools menu then click open terminal.
Also you can just use any serial terminal program to access the openMV cam, I have used putty myself.
It took me a little to get used to the OpenMV IDE but once I did I found it a much better way of interacting with the OpenMV cam