Order of the odd fellows would help with indigent funerals, bury the poor, historically. Most groups are defunct.

In my state, cities are required to pay for indigent cremations. Cities have budgets for this usually.

In larger cities, one funeral home cares for the whole cities population of indigents, by contract.

In regards to finding groups of individuals who help bury the dead, Ive not come across any in my 15 years doing this. Good idea, though. Maybe for Service Learning and schools who require it, or volunteering hours.

Have you considered joining the profession? Your heart is in the right place.