[csw-users] postgres usage?

[Gerard Henry]

hello,
i just installed postgres for the first time from blastwave, and it says that server is successfully started at the end of install, but there is nothing about connect to the base?!
before using postgres, i only use mysql...
but with postgres, how can i connect to the database to administer? if i type psql:
hobbit-henry% psql -l
psql: FATAL:  user "henry" does not exist

How can i create a database? the script /etc/init.d/cswpostgres init
seems to create a database, but what is name?

Thanks in advance for your help,

-- 
Gerard HENRY