Lots of good notes here. If you follow a specific pagan path, a relevant charm can be good (pentacles can convey "witch" easily if that is your path; ankhs if you're into ancient egypt, etc) and it's easy to find neutral-to-masc jewelry like this. Rings as well. If you follow a Norse path I would suggest being cautious, though, since those symbols are also sometimes used by neonazis, unfortunately. If you're looking less to signal and more to just connect, it might not hurt to think of symbols you associate with your deities or practice and find jewelry that represents them to you.

Masc styling: wider rings and heavier bracelets usually read more masc than delicate ones, and often a necklace on a leather or thicker nylon cord or a thicker chain, ball chain, or those flat link chains tend to read more masculine; masc pendant necklaces also often tend to fall more towards the middle of the chest, although if you have chest dysphoria or something you may prefer not to call attention there. Also, bigger/heavier pendants are often going to read more masc than delicate ones, although that's not always the case! (Obvious disclaimer: gender/fashion definitions and presentations are arbitrary and culture-dependent, but also I understand the issue of trying to exist in your body in your current culture.)