What are the estimated living expenses in Melbourne for an international student at RMIT? Can I find part-time work in marketing/sales or as a Spanish tutor in Australia?

I’ll be starting a Master of Marketing at RMIT University in July 2025. I have experience in marketing and sales (one of my strengths). Considering the job market for international students during studies, are there opportunities in these fields?

Additionally, I hold a C1 level Spanish language certification and enjoy teaching. Can I explore part-time teaching opportunities in Australia?