I was very fortunate in that my name got out there very fast. A very large part of that was due to the forums.
I'd recommend you do the very best work you can do, get it professionally photographed by Jim Cooper or Point 7 (Eric) and post it around the forums.
Get a table at a "local" show and put your face/knives in front of people.
My ultimate *boom* in getting started was being picked up by Daniel O-Malley at BladeGallery.com. I think any of the major purveyors would do you well... as far as getting your work in front of people that would be interested in buying it.
It's a very tough road to hoe, making knives full-time. I just plain couldn't hack it. To be brutally honest, I make an extremely clean knife... but I cannot sit down and completely focus on one task at a time. I would need to be finishing one knife, yet instead I would find myself starting a new one. THAT kind of thing won't take you very far.
I have been very, VERY fortunate in getting to find a hobby that I love and a group of collectors that are more than patient with my constantly wandering mind and lack of overall production. If you want to make this gig a full-time job, you have to make a GREAT knife, be in constant contact with collectors/buyers, price your work fairly, and DELIVER. If you really want to blow them away.... deliver when you told them you would!
So... the bold print part: TRY TO MAKE A BETTER KNIFE THAN THE NEXT GUY,forums, local shows, pro photography, try to get hooked up with a major buyer/seller (dealer, purveyor, etc), forums, big show, forums...
Best of luck to you!
