Page History

...

When there is a public comment, any member can volunteer to draft a statement and share it with the rest of membership to be endorsed after going through cycle of edits and comments then reaching consensus 

You can also contact the NCSG chair and GNSO councillors if you want to ask a question or clarification. "Old timers" will be glad to help and support you anytime.

...

GNSO provide several pages regarding the policy development process and how working groups functionsfunction. Understanding the processes makes your participation effective:

1. Ongoing Policies/ Current Working Groups
2. Procedures
3. Working Groups guidelines
4. GNSO basics
5. Consensus Policy
6. The ICANN website landing page for all policy : https://www.icann.org/policy and it laos include a simple infographic about policy development

On other hand you can grasp quickly about ongoing policies processes here via easy to read briefings here and here. There is also a monthly policy update that you can follow and receive a kind of newsletter.
There is a one-stop page to find all information about GNSO and also about GNSO activities during ICANN meeting. 

There is also a monthly newcomers confcall  that you can join to understand how to involved in GNSO working Groups, the material is here and you can find the recordings of the previous sessions in GNSO master calendar  by looking for session titled "GNSO WG Newcomer Open House Session"

There is also the online training for newcomers in ICANN Learn learn.icann.org/courses/gnso