Open preferences (CTRL-P) or the bottom selection in the Edit menu at the top of the screen.
In Preferences, be sure the General tab at the left is selected.
Now make sure Show Start Location on Login Screen is checked.
Now from the dropdown menu just above, you can choose to rez. You can select your home or your last location. Or you can type in the name of a region (simulator) and you will rez there. Svarga, for instance, or Tol Eressea.
You can set your home to land you own, or to group land if you are in a group with land holdings. Otherwise you're limited to certain welcome areas.
Now, if you're homeless, you have the power to rez somewhere other than that griefer-infested infohub.