Where are you studying and in which mode? What is the idea behind exploring a person's personality? If the research is for your final project, where do you intend to conduct your study and what are its aims and objectives? Do you not have a tutor guide in your institution who is supposed to provide you with directions and assistance?
Have you attended the Research Methodology module? If not, please search for Research Methodology and refer to my post on CiteHr; it contains a PowerPoint presentation on that topic. I ask questions before providing answers for two reasons: first, to clarify the scenario to give accurate advice, and second, to empower the individual seeking answers to help themselves first, then present a draft response and seek assistance to enhance it.
Have a nice day.
Simhan A retired academic in the UK