Looking for Advice to move to the UK

Hi everyone! I (25M, Australian citizen) am looking to move to England to be with my partner (28F, UK citizen) in the near future, and trying to work out the best way forward has been rather intimidating and tricky to work out.

I was wondering if anyone had any advice regarding the easiest/most cost effective way forward for this to work.

So far the current plan was to apply for the UK Youth Mobility Visa Scheme and follow that up with applying for a Family (Spouse/fiancee) visa toward the last few months of the t5. My concern regarding this is that I would first need several months of notice before I can enter the UK so I can sort out my affairs in Australia (Namely ending my lease, selling my car and storing the remainder of my possessions), but from what I have read it seems that I will only have 30 days to enter the UK once the Visa is approved and this can vary between as little as a month and as long as six months after I've applied.

Does anyone have any experience or advice they might be able to offer? Thank you!