Hi, could anyone tell me how can i attach my signatrure? Is this option not availiable for newbies? Thanks:)

You should be able to edit your forum signature here: http://forum.team17.co.uk/profile.php?do=editsignature

Note that images are not allowed in signatures. You can add a 100x100 avatar here: http://forum.team17.co.uk/profile.php?do=editavatar