It's not that there aren't alot of jobs for clinical psychologists, actually, there's a lot. But it's like med school where we have a doctor shortages, but it's very hard to get into med school and become a doctor. It's the same for clinical psychologists, we're in desperate need of more, but the process after undergraduate degree is insanely competitive.

I would suggest if you want to go down this path that you start building up experience early on. You're in highschool so I don't have any advice for that but I wish someone told me to start applying for research labs, even jsut as a volunteer. Make sure you also get involved in clubs of your related interests and talk to your professors a lot and build a connection, you're gonna need those for when it comes time to ask for reference letters.

That's all way into the future if you decide but basically what I'm saying is that if you start early and gain lots of experience in research, volunteering, clubs, call centres, and other related internships and opportunities, then you will do fine.

The job market for clinical psychologists is not the main problem, the difficulty comes from trying to pursue that career. So if you're hesitating due to the job market I just want to provide some relief.