Dont give up!!
I would be *horrified* to share my first korkers, and now thats all I do- hundreds upon hundreds of them! It really does take some practice, and you'll get your own little way of doing it. Korkers are probably that one bow that really has a lot of individual "tips and tricks" that you develop along the way!
I agree to add more pieces, and when I tie, you really gotta pull that sucker tight! It might help by starting to make smaller ones, fewer pieces of ribbon to deal with. Then as your confidence grows, your korker can too
Keep up the good work!!