Indeed, a resume is not just a list of your data and work experience, but a tool for selling yourself as a specialist. The main thing is to focus on those skills and achievements that are related to the vacancy you are applying for. Projects can and should be added, but it is important to emphasize those that best reflect your engineering abilities, even if they are not directly related to engineering. Try to be specific: indicate what problems you solved, what technologies you used, what results you achieved. Also, be sure to indicate only those qualifications that you can confirm at the interview. Here is some useful information that may help: https://engineernow.org/post/resume-tips-for-engineers-with-real-examples/8.  

When writing a resume, I tried not to just list the training courses, but to indicate what projects I did, what technologies I used. This gave employers an understanding that I can apply knowledge in practice, and not just study theory. It is also important to correctly customize the resume for each vacancy, emphasizing those qualities that are important for a particular company.