Are there specific nuances in the Eastern Cape variant I should be aware of?

I’ve been learning Xhosa through a few disparate apps, but I’ve just found out that some of the vocabulary I’m picking up seems to differ from what my grandmother uses. She’s originally from the Eastern Cape, and I’m worried that my mixed approach is making me sound inconsistent or like I'm picking up bits and pieces from different regional versions of the language. How can I better align my learning to sound more authentic for my family?