Please read as much as possible of “Dreams: the basics” by Dale & Carola Mathers, London, Routledge, 2024 but prioritising chapters 1, 2, 5 & 6.
Further reading could be:
“A guide to the world of dreams”, Ole Vedfelt, London, Routledge, 2017, Chapter 3 ‘ We Dream Because We Are Complex Beings’ and any of the rest of it, especially chapters 15 and 16