I used a multimeter to test that everything is connected/grounded, at least I hope I did. It shows continuity when I touch all metal parts, so everything seems grounded. So I just don't get what can possibly be causing the weird buzzing especially when touching the metal stick of the pickup switch.
From what I understand, if touching metal parts makes noise go away, that is normal. But if touching metal parts makes noise worse, then theres a grounding issue. Touching any metal part on my guitar makes the noise lessen, except when I touch the metal part of the 5-way pickup switch lever (metal part). Not sure what else can be the issue if multimeter says everything is connected properly.
Please let me know what else I can do, maybe I'm missing something, thanks!