I was studying data science and collecting information here and there, and it was really good that you explained the related job groups in detail. I actually thought there were only two job groups, data analyst and data engineer, but it was more detailed, such as AI engineer, AI research engineer, growth hacker, etc. It also told me what kind of experience I could have at which company, and it was a great help in deciding on my career direction. I think this is probably enough for a beginner's data science career guide. ^^