Hello from Australia

I'm a fairly novice gardener living on a rural property in the swampy subtropics in NSW, Australia.
My father inherited a number of orchids from my grandmother that he is no longer able to care for and has asked me to see if I can tend to them. They have been neglected for years and I thought that I might be able to find some help/tips here on how to resurrect them.
Pretty keen to learn how to look after them because they smell great when they flower