Hey welcome.
The Governance Forum takes care of discussions about Governance in Shimmer and IOTA. If you want to change something or propose something concerning the Protocols, you can start a discussion here, maybe in #shimmer-governance-proposals, and see how others perceive this proposal.
With enough support from others, this can emerge into a governance vote amongst all token holders and a change in the network,
We have a guide that describes the procedure: READ FIRST - Shimmer governance guide
The whole process of Governance is explained in our Wiki: Shimmer Governance | Shimmer Wiki
Please ask further questions if you want to know more!