Request for Technical Guidance on OAR Contouring and RTSTRUCT Export Using 3D Slicer

Respected Team,
I am Dr. [Your Full Name], BHMS, currently learning and developing skills in OAR (Organs at Risk) contouring using 3D Slicer.
My goal is to understand the complete technical workflow for accurate delineation and DICOM RTSTRUCT export suitable for radiotherapy planning systems.
At present, I am working in a self-learning and research capacity (non-clinical), and in the future I plan to establish an outsourcing OAR contouring support service using 3D Slicer.
I would be grateful if you could kindly guide me or share any resources on the following points:
Recommended modules or extensions for automatic or semi-automatic OAR segmentation.
Correct process for RTSTRUCT export, including how to ensure proper metadata, geometry matching, and DICOM compatibility with planning systems (e.g., Monaco, RayStation).
Any best-practice advice for maintaining data integrity and structure naming conventions for radiotherapy workflows.
Thank you for your valuable time and for providing this excellent open-source platform to the medical imaging community.
With regards,
Dr. RUPEN RAJVIR
BHMS
Email: (removed for privacy)
City: Rajkot Gujarat