You may have to revisit this screen in order to change the nick as the nicks have to be unique across all people. Select a name you know no one else will use or if the name is in use append numbers or other unique suffix. Press Save Profile button. Save the profile using defaults provided by system. Another words keep pressing OK .
Press connect button.
You will get a lot of text in a status window. Ignore it for time being. Select Options menu and Autoexec Commands. Fill in the dialog as shown below. Press Save button.