Grounded Theory (GT) is a qualitative methodology based on symbolic interactionism that, through constant comparison, simultaneous data collection and analysis, and the inductive construction of meanings, seeks to understand how individuals experience certain phenomena and to develop theories from these interpretations, requiring methodological rigor, prior practice, and critical reflection from the researcher. Aim: To critically analyse the application of Grounded Theory, from data collection by interview to categorisation, deepening knowledge and skill in its use. Methods: An experience report as part of an academic essay for a doctorate in nursing, with a semi-structured interview with a nurse from a nursing home in Portugal, following the Strauss and Corbin approach, with open coding of the data. Findings: Challenges were identified in formulating the questions, deepening the answers and analysing the data, highlighting the importance of practice to ensure methodological rigour. Discussion: The challenges encountered confirm that the initial application of Grounded Theory is demanding, particularly in balancing openness to participants’ perspectives with the structured procedures of the method. The experience highlights the importance of reflexivity and practice in developing theoretical sensitivity and moving from descriptive coding to conceptual abstraction. These findings suggest that GT, while complex, offers significant opportunities for researchers to strengthen methodological skills and generate deeper insights into nursing phenomena. Conclusion: It was concluded that the experience made it possible to develop investigative skills and integrate key concepts of GT. Practice and critical reflection proved essential for the effective application of the method, making the study a valuable resource for researchers in qualitative research.