An example development path for a future Scrum Master/Agile Coach:

Management 3.0 training: foundation
How to work in Scrum - introduction and process simulation
The use of IT tools in managing team work (Jira, Trello, Miro)
Working with requirements in an agile approach
Evidence Based Management, or how to work with metrics
Training: agile change leadership workshop
Training: agile people & team leadership
Design Thinking - Innovation based on understanding user needs
Training: Objectives and Key Results (OKR) method

Check out other training and development paths

All training
For the manager/leader
For the product owner