Personally, I don't think this kind of training is necessary at all. Even if it is expensive, most enterprises don't recognize it. Many managers have told me that it is completely unnecessary to take the internal auditor certificate during college. When you have a few years of work experience, it will be much better to attend the training.
If you are really interested in EHS and want to be the direction of your future work, it will be much better to lower your requirements when you are employed and become an EHS Commissioner or clerk and accumulate experience in your work.