A good way to start will be the following reference:
https://www.nature.com/articles/nprot.2006.52
Corresponding to:
Pfleger, K. D., Seeber, R. M., & Eidne, K. A. (2006). Bioluminescence resonance energy transfer (BRET) for the real-time detection of protein-protein interactions. Nature protocols, 1(1), 337.
See for an example: https://journals.sagepub.com/doi/pdf/10.1177/1087057108324032