Nice work, I always wondered how well hand tracking could be used in most games without movement inputs (outside of possibly teleportation) and forgot all about tea for god!
I don't have a quest myself but its awesome to see your implementation of it, hopefully finger tracking will get more attention if someone makes an open source version for PC (or valve packs it into steamVR) with so many headsets having 2 or more cameras on them now it could probably have some level of input on most devices.
The Vive/Pro do have a finger tracking sdk (https://developer.vive.com/resources/knowledgebase/vive-hand-tracking-sdk/) but I'm not sure anyone even knows it exists.