If he's thinking about being a coach/being self employed (which I actually think is feasible) he would be FAR better just starting marketing himself and learning on the job.
Build a website, look up how others are marketing themselves, if he's got good manners and customer service skills and rapport that counts for a lot more than the degree.
He needs to reply quickly to enquiries, be good at scheduling, etc. Learn to make people feel comfortable in Zoom calls, have a payment system set up.
There's free online learning from reputable providers (including top universities) which will give him more in-depth knowledge.
So if he wants to put Module X in Psychology from X University on his profile he can do that.
I got a fitness trainer style qualification some years ago. It was a total waste of money and time.
Absolutely no-one cared about the credentials, the course was essentially a Ponzi scheme....all the income I subsequently gained from classes was from my personality and free effort and sales skills, not the certificate. No-one cared.
I would have done a lot better just starting myself and learning from experience and building up a client base. The course sort of felt like a "safer" option but was just a marketing con.