If you've already used your once in a lifetime WHV (which was a 417, not a 457) opportunity, then the ONLY way you can live and work in Australia is if you can get a skilled work visa and as a new graduate with a Communications bachelor degree, that's going to be extremely difficult and perhaps impossible.
Australia has two different kinds of work visas - points tested and employer sponsored which are not points tested.
For a permanent independent subclass 189 visa which is a points tested visa with no state government or employer sponsorship, your occupation must be on Schedule 1 of the Consolidated Skilled Occupation List (CSOL).
Schedule 1 CSOL
If your occupation is on Schedule 1 OR Schedule 2 of the CSOL AND is also on the State Migration Plan (SMP) for one of Australia's states or territories, your occupation is eligible for a points tested state sponsored subclass 190 (permanent) or 489 (provisional) visa. You must be granted sponsorship by the state in question before you can apply for a 190 or 489 visa.
Schedule 1 and 2 CSOL. The first 6 pages are S1 and the remainder are S2.
State and territory migration sites
If you score at least 60 points on the points test, have completed English language testing (if required) and have obtained a positive skills assessment from the organisation responsible for assessment of your occupation, you can submit an Expression of Interest. Your complete EOI will then be ranked on the basis of your claims against points test factors. Invitations will be issued to those who achieve the highest rankings, subject to the operation of the occupational ceiling which applies to each occupation. The more points you score, the better your chances of receiving an invitation BUT, be sure to only claim points to which you are definitely entitled. If you receive an invitation based on a claim for higher points than you actually score, your invitation will be cancelled; you will lose your Visa Application Charge AND may get a 3 year ban on reapplying.
The points test
If you have an occupation on the S1 or S2 CSOL but can't pass the points test, you may be eligible for an employer sponsored visa but you must have found sponsorship for work in that occupation with an eligible employer before applying for a visa. It is possible to submit an EOI for employer sponsored visas - those EOIs are accessible to employers who are looking to sponsor workers.
The only work visa that has no specific list of eligible occupations is a permanent employer sponsored Regional Sponsored Migration Scheme (Subclass 187) visa. The work must be in a designated regional area (NOT the Gold Coast, Brisbane, Sydney, Wollongong, Newcastle or Melbourne) in a skilled ANZSCO skill level 1 to 3 occupation requiring at least diploma level or equivalent qualifications. RSMS visas are not points tested.
If you're having trouble identifying an eligible occupation that fits your qualifications and work experience, check the ANZSCO list of Australian occupations to find the best fit but remember that for anything other than an RSMS (187) visa, that occupation MUST appear on the CSOL.
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Visa information and EOIs:
The only way your family and/or friends can help is if they are or have contacts who are potential employers who may be willing to sponsor you (assuming of course that you meet the requirements for an eligible occupation). Forget about relative sponsorship - it is restricted to people who have Schedule 1 SOL occupations AND the relative can't live in Brisbane, Sydney, Newcastle or Wollongong) AND only 4200 relative sponsored visas are available each year so they take a long time to be granted.