What to do at this point

I'm a highly goal driven type of person. Now I've come to a stage where I'm thinking I want to do some further higher education, but where should I place my energies? Should I continue with Nursing? The studies are challenging and I enjoy the placements immensely but would I enjoy it once I'm out there on the ward floor with a patient ratio of my own?  Or should I do my Masters in Teaching, make use of my BA and go and inspire fresh minds, or try once I get the classrooms listening to me? One of the people in my life I look up to told me yesterday that I should go on with nursing now while it's fresh in my mind because he believes I'd do well in that career path, having been a paramedic himself so understanding the realities to some degree of the work. 

The fact is I love study and at this time I'm working for a local garden (biggest cool climate private garden in the Southern Hemisphere, to my knowledge) and doing my trade in Horticulture which is by distance but easy enough, comparatively, having just completed a Diploma and before that an undergraduate degree. I love working outdoors and having the time to listen to subjects I know nothing about via podcast as I weed but I know I'm someone who appreciates a bit of mental stimulation and responsibility which is why I'm drawn to the two paths of teaching or nursing. 

Then to add to the mix is my love of the environment and my background in the Forests, albeit as a Fieldworker. I would love so much to make a difference in our invaluable environment in a position of environmental officer or where I can promote sustainable activities and raise a business' environmental reputation.

Oh what a curse to have so many passions to cultivate. If only it was easy like one of those people who know what they want to do in high school, follow their dream and everything fits. Although I know in my mind even if that were the case my curiousity would compel me to question if that were all there was to my life anyway. 

So there's no winning. Feel like you have any suggestions? Please share!