Your goal while onboarding is to connect your work to the bigger picture of what your team/org/company is working on, and build your own ideas around priorities.
Signs that you're helping people:
Are you adding value? Are you able to help people newer than you?
Are you able to improve the onboarding process and get feedback from coworkers about the changes you're making?
Are you able to understand and contribute to code reviews?
Signs that you're not doing well: