once you’ve decided on a general topic, theme, or question to research – and have considered your *goal* in that research – you need a library of information to explore.
1. find relevant reviews published in the past 5-10 years.
2. find the articles referenced multiple times; read them.
3. find any common authors among the articles; read whatever they’ve published recently.
you can find further reading or instruction through online courses, syllabi from university courses, and checking the reference in relevant pop-sci books.