my two guesses:
(1) 'Ich' should be inserted (in thoghts) before the 'bereite'. It is poetic licence to leave it out (like often in English: 'Got your letter today'). And so it becomes as many have posted: (I) prepare for you, Jesus,...
(2) 'noch' here is not 'still'. It is used in a sense like in 'noch heute' when it has to be translated as 'starting today' and not as 'still today'. 'Noch heute werde ich mit dem Rauchen aufhoeren'. The 'noch' here underlines the urgency of 'heute'. In that sense 'noch itzo' means 'from now on without any delay'.

Wolfgang