I'm not sure about re-directing, but you could edit your lang.php file.
So where it says this -
PHP Code:
$regsuccess2 = ". Your account has been created and you have automatically been logged in. You can now <a href='adopt.php'>Adopt Some Pets</a> or <a href='account.php'>Manage Your Account</a>.";
You could change it to this -
PHP Code:
$regsuccess2 = ". Your account has been created and you have automatically been logged in. You can now <a href='adopt.php'>Adopt Some Pets</a> or <a href='account.php'>Manage Your Account</a>. You could also head over to <a href='pages.php?page=firstlogin'>here</a> to help get you started";
Or you could go about editing it further, if you have HTML knowledge. Y'know, since you're re-directed to here if you register correctly. I think adding further code onto here would be a waste of time.