upgrade from wordpress ro Drupal

Hi all,

Sorry i am new to Drupal, but i like what i have seen of it so far, i run a Baby Rockers website which is built around wordpress but after spending hours reading through Drupal i am really keen to see Drupal instead, but am worried about losing data migrating or even having to start from scratch, so thanks in advance for any advice that would help me move my site as quick as possible so i don't lose any downtime.

Is there a migration tool ? would i be better off starting from scratch ? will google penalize me ?

Sorry like i said i am new to all this, but really do appreciate any help provided.

Regards Lisa