Hi Nishith,
It appears that you do not have access to a sandbox environment, which is required to interact with our q2-sdk package. I would recommend reaching out the FI you are interacting with as they would need to be licensed with the SDK. Once completed, requests can be made for a sandbox environment (a widget for sandbox request will appear in your dashboard in the q2 developer portal https://q2developer.com/dashboard), Once provided, the setup guides in our documentation (https://docs.q2developer.com/setup/index.html) will walk you through getting started from there and this will include retrieving our caliper_admin script, which is designed to handle various operations to get you set up, including creating your virtual environment and pulling the q2-sdk package in addition to other relevant packages required for development.
Thank you,
Solène