There are copious amounts of information out there regarding pressure points and meridians. These days it comes in many formats to conveniently accommodate any device, LoL.
If you want to learn it so you can apply it in your massages for your mother then you can learn much on your own. You might find that in so doing other interests arise, perhaps herbal remedies, Qi disharmony, deficiency and excess and other disharmony in the body...there is a lot out there.
If you want to learn it to get some kind of certification so you can practice it as a means of making a living, school is a grand idea. I'm not certain you can learn just the acu-points though, generally the "whole thing" is taught including diagnostics and treatments, even clinical internship which is a great experience.