Which short course helped you get hired? after 10 years as a social media manager

I am considering a short certificate to improve my chances as a social media manager. I can study evenings. Which ones are overrated?

The workforce centre told me about training funds I qualified for. It covered most of my course.

Thanks for writing this out. I went through something close to it last year, and it got easier once I kept a simple log of every call and form.