There are quite a few questions here.
Generally speaking, a dissolution action must be filed in the place where the parties resided for the prior 6 months. There may be a different rule in Hawaii, so I cannot comment on that. If you resided in California, then the proper state for filing might be California, not Hawaii.
Only you can determine whether it is worth fighting, but if you do not respond, you run the risk of losing your rights or having orders entered against you.
Take your papers and the ones from the California case and consult with a local family law attorney.
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