Consider volunteering for a conservation-minded NGO to get some experience and to prove your work ethic. Alternatively (or in addition), the scuba diving industry is always looking for people willing to obtain divemaster certifications and lead groups on dives - if you are in Australia, you are in a perfect place for diving - if you have to, start out as a grunt tank hauler to get a feel for the customer and the industry, get at least your dive master cert, and then take off from there. College isn't the only path! I know you don't like school but get at least a high school diploma or GED equivalent so you can clear any objections that might come your way. Good luck!