Lions (get it?) and other types of wildlife are guaranteed at the famous Australia Zoo. Yes, it’s a little clichéd, but you can’t go to Australia without having petted a koala or a kangaroo. Thus the day trip from Noosa via bus is 100% worth it.
I fantasize about going off the beaten track and exploring new places, however, this is a well trodden track for very good reasons. Although Australia is getting more expensive, it is easy to travel cheaply, with your pick of many cheap hostels and bus transfers. This is especially true if you travel for a longer period of time. This is a good first foray into backpacking and budgeting, setting you up for slightly more adventurous travel choices in the future. So pack that backpack, shed those plans and relax into the chilled Aussie lifestyle.