I’m thinking of possibly looking at going to college for many PhDs. Mainly in the following. Business (Business Management, Advertising, Marketing and Accounting), Psychology, communications, forensic science and psychology, developmental biology, healthcare, biology, and more.
You’re starting on the wrong end of the equation.
What type of career are you pursuing afterwards? Usually a PhD is a gateway to academia. Do you want to be a professional researcher, lecturer, professor…?
In case you want to work in a company, choose something at least partially related to your past career and academic history. Changing course radically after a PhD is possible, but still a new start that comes with setbacks in regards to (perceived) seniority.
If you’re more keen on the title but intend to stay in the same career you’re in now, maybe opt for a DBA (doctor of business administration) instead. The structure is generally the same, only that you’ll be researching a problem directly related to your industry. It’s more about applying existing theories/research in a new field than about novel research, so the theory/practice part is reversed (~30% research, ~70% application) when compared to a PhD.
I just want to learn.