There is some info on syncing in the docs
If you need access to short-term storage under /g/data you could approach the ESM Working Group as they have some resources available to researchers.
As for analysing the data, it’s usually good to avoid post-processing the data. If you don’t need specific CMIP compatibility then I’d suggest using intake data catalogues to simplify access to your data.
There was a recent training about this
You could try following the tutorial and see if that approach works for you.