Honestly, it's a little late. People's brain power does have an impact with the growth of age, so be prepared for hardship. In addition, at the age of 30, you have to consider how to balance work, family and study. When peers are struggling for their careers, is it really helpful for your career to go to college again? I think if all these problems are solved or the answer is yes, you can try to go to college. At present, graduating from college is relatively simple, but if you really want to learn something, it still takes a lot of energy and time. I hope it helps you.