Barista course or RSA certificate?

Hi everyone. I’m a student (not international - domestic) looking for part time/casual work but I only have a few months of work experience and am having trouble finding work.

I’ve had some places ask me if I’m barista trained or have an RSA, and while the answer to both is currently no, I’m now wondering if it would be better to just spend that extra money on proper training if it would open up my job opportunities significantly. My only fear is to spend that money and still have no luck with job searching.

Are either of these courses helpful at all? I’m 20, if age matters too