As a newbie, is it still worth to learn perl 5

Yes, I think it absolutely is still worth learning Perl 5, for a number of reasons.

• Perl 6 is not out yet, and probably won't be out for a while. I think it will be worth the wait, but there is still some waiting left.
• Even when Perl 6 comes out, Perl 5 won't be going away. Perl 5 is being ported to Parrot (which is the new VM what Perl 6 will use). That means Perl 5 and Perl 6 will [theoretically] live in happy harmony with each other.
• And even if Perl 5 was obsoleted the minute Perl 6 was released, Perl 6 is still Perl. Many things have changed, but knowing Perl 5 will give anyone a huge head start in learning Perl 6.