Andy,
I lurk on here more than I post, but I'll throw a couple of comments out here.
Of those in the knifemaking community who know me, very few know that I am a wildlife biologist. That, in itself, was a long road. I discovered my passion for it at an early age (14), spent 6 years pursuing a BS and MS, and put another dozen years in paying my dues before landing a permanent job in my field. While I don't know your situation, I've met a lot of guys along the way that love the outdoors, love hunting and fishing, and think they have what it takes. The wildlife field isn't hunting and fishing, it's applied science, and many don't understand that early enough. While I typically don't like to discourage people from their dream, at the same time I don't want to encourage you to pursue a degree that you've decided you don't want. The wildlife field is highly competitive--the only employers are state and federal agencies, consulting companies, and perhaps a handful of stable NGO's. Of those who've stopped at a Bachelor's degree, very few find gainful employment in the field and of the many who don't, they usually go onto some other line of work where a 4-year degree may or may not have helped.
I've made knives as a hobby for over a decade, and in my time interacting with other makers and watching others on the various knife forums, I find that to be successful at knifemaking it isn't that different from other professions with a limited market, such as wildlife. You have to be at the top of your game. You have to put in your dues. Even on your worst day, you have to want it. Many love the hobby, but dislike the job. So you've made a few knives and you like it. Great! Personally, in spite of the fact that I love my current job, I wouldn't want to be a knifemaker full time. I know that I can go to work and do one job--wildlife biologist. I know that if I ever tried to be a full time knifemaker I would have to be production team, artist, marketing and sales rep, head of maintenance, director of purchasing, travel agent, accountant, head engineer for R&D, chief of quality control, and at the end of the day, run the call center and complaint department!
Like others on here have said--stick around and watch. Learn from the guys that have imploded when family emergencies happened and bills started piling up (Google Dale Chudzinski and Mark Wohlwend, and there are others besides them). Very few guys become successful at this. Of those, even fewer survive the success. Don't forget, bad news travels faster than good news. Talk to the guys that have been successful at this, and by successful I mean the guys that have made knives full time for 10, 15, or 20 years. There have been quite a few that have made a good go of it but have disappeared after 5 years.
Also, realize that you want to create a product to sell to people who don't need knives. They spend disposable income on a custom knife the way that someone might buy a Corvette instead of a Kia. The people that need knives go to WalMart and spend $20. The people that WANT knives, and have the extra cash to buy what they WANT, will be very particular. And when the economy hits a slump, those people spend less on what they want because they have to make sure they spend it on what they need. As a result the makers who were getting by in the good times struggle when the economy is slow.
Right now you have found a hobby that you like. Go and learn to make knives--learn what makes a functional design, and an attractive one. Learn to make sheaths. Then go to a knife show, take a couple of your knives along, and compare them to the big boys. If your work is on par with those, then maybe you'll be ready to start selling.
It's at that point you'll need to decide if you are going to be a hobbyist or a businessman. And it's at that point that it won't be about making the knives, it will be about running a business. Use the search function here and look up Les Robertson's older posts from over the years about finding your place in the market. Learn about how to develop and follow a business plan.
Good luck. Work your ass off, learn everything you can, be a gentleman in the business and build your reputation and respect.