I currently have no Star alliance allegiance, however have an upcoming trip where most flights will be on Star alliance carriers. I might as well get some benefit from the travel, if I can.

Phuket - Bangkok - Econ, Thai
Bangkok - Phuket - Business, Thai
Phuket - Hong Kong - Business, Thai
Melbourne - Perth - Econ, Virgin Australia as SAA
Perth - Joburg - Econ, SAA
Joburg - Durban - Econ, SAA
Joburg - Istanbul - Lisbon - Business, Turkish
Lisbon - Malaga - Econ, Iberia
Malaga - Amsterdam - Econ, Vueling
London Heathrow - Melbourne - Business, Thai

With a mix of Business and economy flights, I might get something I can use in the future. My priority would be Gold and award flights, if possible.

I would appreciate your advice on a program to join.