Does my itinerary makes sense? Rome->australia whv->greece in 3 months.

I'm flying to australia on a whv today, from Rome, however I will visit my girlfriend who goes to greece in August. That's only 3 months, best case scenario I imagine I break even or if very lucky I get jobs instantly and can gain money, however plane tickets out of australia will probably cost around 1k euros.

Does it make sense to go now or should I wait for after that ? My visa is valid for 1 year starting from arrival on the territory and I got a VERY good 530euro deal ticket, so In case I do not go I "only" lose 530eu-150refun in case of no show.

I'm thinking about going to her homecountry (poland) and try to find work but I speak french/english so that isn't in my favor.