You can do all the research in the world – biological, psychological, physical, political, historical – but it is pointless if it doesn’t lead to the creation of events and drama.
First, write the story and then research. Don’t get bogged down in unnecessary description. Facts for fact’s sake bore readers. All that is needed is the unobtrusive inclusion of a few authentic facts. There is no need to be an expert. Find out information that is relevant to the plot already planned.
Use research to illuminate characters and to advance the plot, otherwise leave it out.
Research is the meat that feeds the beasts of imagination and invention. It is never an end in itself.
Before plotting, get a ‘sense’ by browsing books to pick up facts, labels and jargon. All this gives a flavour of authenticity and enriches the plot. Find out about the antique furniture and decide on props for filling the settings. Then write.
Now, once the first draft is complete, return to research for specific facts that relate to the story.