@timetochange04
I went at 30 and 8 months (9 years ago) on a WHV and managed to get my 88 days in prior to 31st to get a second year visa. Visa is a bit different now, so do research on what you need now to get extra years added.
But, it was the best decision I ever made!!
I made so many friends all over the world (so have so many cheap holidays now visiting everyone), met my now DP of 8 years (who moved back to UK with me when my visa expired). I learned so much about myself, made me realise what I wanted out of life and what I would and wouldn't accept of people and situations.
I stayed in quiet hostels rather than party hostels (reading reviews will give an indication of what they are going to be like), lived (& slept) in my car for 4 months on a (solo) road trip around Australia, worked all sorts of weird and wonderful jobs.
I went with very little plan after the farm work, and my plans chopped and changed all the time. I had every intention to move to Melbourne, but ended up only staying 2 weeks and spent much longer in NSW (at least 1 year) and Alice Springs.
Even after I met my DP I carried on travelling solo and with friends, as I didn't want to regret not taking the opportunities afforded to me.
There was a great Australia Backpackers Facebook group back then, not sure if it is still active.
Feel free to message me if you want any specific advice.