Research on issues faced by visually impaired citizens using Indian currency.

Hi! I am a design student and I'm researching the issues faced by the visually impaired (all impairments on the spectrum for now) in using the Indian currency notes for my design thinking skills course and later I will redesign the notes accordingly.  I would greatly appreciate if y’all could provide inputs regarding the user journey of these people during transactions, the issues they with the notes (tactile features, colours, size, differentiating between the notes, time taken on an average to complete transaction, if help required from an abled person or not, if they personally face some unique struggle, if they ever faced some monetary issues because of their disability, etc).  Whether you or someone you know is visually impaired, please share such details it would greatly benefit in the research process!!! You can write in the comments or even DM me if you think i might ask some more questions regarding this. Another input that would be helpful is the new age technology of UPI. what are visually impaired users’ feedback  regarding online transactions? Do they still face issues, if yes then please state issues and also let me know if you like it better than physical notes or not and reasons for both as well.  And what kind of features you would suggest for the new design to help solve the issues. Feel free to give all kinds of suggestions!  Thank you so much!!!! Your inputs would genuinely help a lot and maybe it will make the change this community needs.