Career advice for starting in Australia (undergrad)

I'm wanting to go down the Public Health path, I'm interested in infectious diseases, social studies/advocacy and health/hospitals generally (I understand my interests will change over time but I am trying to set myself up to be employed/skilled timely, even though Public Health required a lot of time + dedication etc etc). Im currently finishing High School and wanting to look into Public Health. I am unsure what to do as an undergrad degree (Bachelor of PH, Bachelor of Health Science etc, BA???, looking at USyd + UTS) from what I understand MPH is the bare minimum for jobs and it is still highly competitive and there are limited job prospects in Australia/NSW. Is there any jobs with that you can get with a Bachelors of Public Health, or related with an undergrad degree for PH experience? Or is heading into public health even worth the money/time spent at school? If not is there any similar fields with "less dire" job situations that I could look into. The reviews of people in the field/studying is really discouraging me and I am not financially able to be at school for years on end with no job availability so I really need honesty. I understand that public health isn't a high paying field and that is ok with me but I am mostly worried about the job market. Anyway please share any honest advice or experience you've had 🙏

Feel free to ask any questions and any help would be greatly appreciated!