Is it reliable to transfer self-study data analysis to data analysis?

This may be difficult, after all, this belongs to the back end. The front end is all testing or development, and some are really self-study and then looking for a job. But data analysis, although you will be exposed to various projects through self-study, may not be recognized by some companies, who will think that you have no practical experience and are too idealistic. So you may still need to find an internship in a small company to witness your experience and ability. If you can get ahead, then you must make yourself stronger and get in touch with better actual combat tactics. If you really have that vision, there will naturally be headhunters to dig you up.