Lau In Aus

Good Evening Thank you in advance for any advice you can offer for my sister in law. Currently my sister in law is living in the UK and has a UK Passport. She would like to emigrate to Perth to join her family here. The only other family she is has is one half brother (estranged). She is a qualified aged carer and has potentially secured a job offer in Australia but needs to sort out a visa. She is in her mid 50s. We are thinking of options like a skills shortage visa, work visa, last remaining relative? But really don’t know the ins and outs. Thank you so much.