I agree with Mr Selfish, quite a few employers would be concerned that a green pilot with his theory credits is only chasing hours. I do think that its a good idea to get your subjects done as early as possible. Start with the IREX, which is an absolute requirement for a co-pilot slot these days, then sit the ATPL. At least one operator in Australia will employ you on the condition that you complete all of your ATPL subjects within 6 months.