Our recommendation would be to understand your situation as best as you can. If you need to do the farm work then focus on that as your work rather than something else. If you are fortunate enough not to have to do the farm work then Australia is your oyster! The only condition that everyone has is that you cannot work for the same employer for longer than 6 months, and we will get into that very soon.
How Easy Is It To Find Work In Australia?
Having driven a lap of Australia in a campervan I can honestly say it is so easy to find work. There are "help wanted" signs in most store windows, farms are crying out for helping hands and most industries have a people shortage. If you need to undertake your 88 days of farm work then you will not struggle to find an orchard, vineyard, or mango farm that would love to have you onboard.
Danielle and I work remotely as we travel so we didn't need to do any specified work during our first year visa. We did pick up jobs in Busselton, which is a small seaside town in Margaret River in Western Australia. The weather further south looked very bad for the next month at least, and we were heading into one of the best beach regions in Australia. We were making our way towards Esperance in South West WA and didn't want the weather to ruin our trip. We had the time, so we called a few places in Busselton and both found jobs in a matter of days. Danielle did some cleaning in a motel, which meant we got a cheap room that was a welcome break from the van we'd lived in for several months. I called the closest pub, asked if they had vacancies, and started working there less than 1 week later.
The bottom line is there is work in Australia, and it is not difficult to find.