I bought some Bamboo Palm seeds and haven't been able to germinate
them. Can someone give me advice?

This group is for Bamboo not palms, you are more likely to get a useful
answer at rec.gardens .

The only Chamaedorea that I have grown is C. microspadix and that just
got potting soil in ordinary house plant conditions - 70ºf day 65 night.
It has fruited and germinated in lathhouse conditions too.

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09=IX
Prunedale California
Prunetuckey-By-The-Slough
Near Monterey Bay and Elkhorn Slough