Hi Arnie,
Great comments from Jacqui and lauriek for you to consider. I think you are way ahead already with most 20 year olds not thinking with your winning attitude and goal in mind or having your substantial savings in hand.

If you are not absolutely sure about nursing and you are just doing it to do something then maybe you should follow your passion for property. I did a Bachelor of Aviation Technology and got my commercial pilot license but i didn’t follow my passion which is also in property and ended up not achieving a career in aviation and am now an office worker with a years of life experience, a renovation done and renewed goal to be successful in property development. If i had a time machine…but anyway this is not about me.

How about getting a job working for a developer or real estate office or anything associated with property. You will certainly receive valuable lessons working with someone who will teach you what they know about property. I am sure your education in property from working there will be enough for you to make a more informed decision whenever you are ready. And i am sure you will come across inventive ways to buy property even without a full 20% deposit. ie: going into joint ventures, partnerships or even syndicates.

I am not an expert but if you believe you have it in you to retire young investing in property then you will succeed.
Good luck.