udam (above post) has pretty much said it all.
your 19 so unless you have lived in the wild all your life you will have to really get those skills down which will take years.
here is a link to a course
http://www.plumpton.ac.uk/pages/documents/PlumptonBushcraft.pdf
strings to your bow
i have known so many people who have tried to make this there living and some very able people
the reality is the jobs are few making money hmmm well i wouldnt put a deposit down on that posche for a while.
outdoor education route is a great place to start and you are 19 so you have it all going for you in terms of health
getting your kayak/canoe instructors climbing bela starting working on your mountain leeders asap
also you could probably find apprentice ship type work in outdoor centres you will be paid like a slave but it is a great lifestyle
just avoid getting too social keep focused on your long term goals
keep yourself fit and well !
outdoor teaching is demanding on every level but the base level is being physicly fit enough to rise to it
you can be an amazing paddler/climber be able to survive for months with just your knife but if you want to teach you have to be that a teacher
teaching is a skill unto itself and though some people take to things more naturaly than others. teaching is a skill that is learnt and refined over years.
also consider this
do you really want to teach this stuff
you may really enjoy being out in the wilds do you really want to be focused on teaching others ?
instead of just doing it ?
at 19 also you could consider the military option (i would pick raf regiment if i was pushed to advise).
it may not be your thing but consider that you will certainly be kept fit in this job you will also have a lot of oppotunity to learn and practice
fieeld craft.
saying that in the current world climate you are certain to see active service in theatres of conflict so you need to consider this carefully
though it will "season you"
another angle is tree surgury again at 19 you acn get an appenticeship and do a college course at the same time mix that up with voluntree work
with local scout groups or other such organisations in 4 or 5 years you will have a stong grounding in all things outdoors and the woodland enviroment.
if thats not the way for you (and im assuming you are in the uk) maybe move yourself to a national park area and look for apprenticships through outdoor centres
if this is the path you take it will be hard work and at times very frustrating
write down your long term goals and keep refering back to them esspecially when you have another week
where all your mates are out on the lash and you cant afford to join them
and you need to be switched on for that group you are taking out tommorow
good luck !