Data analysis start from planning the research in the first place. What statistical procedure to use depends on your research protocol. Specifically, study design and sampling method while validity of your findings depends on the sample size etc.
I would recommend you start a course in research methods which will cover the whole process of planning, data collection and instruments, data management and analysis. Services on data analysis alone should be a demage limitation measure for those who could not attend the course.
I am 100% sure that someone who has data from research and he/she does not know how to analyse it (except for secondary data not collected for research purposes) will have problems understanding the outputs.