'Doing your early years research project: A step by step guide’ by Guy Robert-Holmes, published by SAGE Publications Ltd, 4th edition 2018

Read:
Chapter 1 ‘You can do research!’
Chapter 6: ‘Creative listening with young children’
Chapter 7 ‘Observation: Looking and listening’ Chapter 9 ‘Interviewing children and adults’
Chapter 10 ‘Analysing your qualitative and quantitative data findings’
NB You should be able to borrow this from the library or you may be able to find an online version.