I'm an actor and I want to update my availability on my calendar to appear on casting call search
You can do this in two ways. Log-in your profile at the Talent Portal and it should show you this:
Click on yes and it will marked you automatically available for the next two weeks.
You can also manually set your availability, Click on Calendar:
then click on the dates that you want to update. Click on the pencil icon at the upper right corner of the screen and mark yourself as available:
You can also check the following sites for available casting calls that you can apply to: