If you are appointed as a Guardian, your duties may depend on what powers you were granted as a guardian. For example, if you have been appointed as a limited guardian to make medical decisions your duties may include talking to the ward's care team, making decisions about their care plan, signing consents for surgeries, and other things of that sort. If you have been granted the power to make placement decisions you may have the duty of talking to residential homes or rehab facilities to sign any documents they may need.
In addition to the duties listed above, the court will also likely require the Guardian to visit the ward at least three to four times a year and complete an annual report about the ward's condition and medical treatments they may have had. This allows the court to see if a Guardianship is still necessary and can help determine what your Guardian duties may be moving forward.