The hard fact of crafting is that not everything in your recipe list is sought after
Gathered materials - Taking up one of the gathering professions, the primary materials gathered can be sold Dofus Kamas to crafters. Crafters consume these materials at incredible rates and it wouldn't be a surprise if a shortage of supply occurs.
As to what price you want to sell your gathered materials at, it's totally up to different individuals but try to remember that the lengthy time you take to cut 1 tree is due to your inexperience (as a low-level gatherer) and so do not expect booming returns simply by cutting a few trees or gathering a few flowers.
Crafting - The next step up would be to take up one (or more) of the many crafting profession and start making stuffs to sell. The hard fact of crafting is that not everything in your recipe list is sought after, especially if it's possible to drop them from mobs with a low prospecting lock.
In any case, it is possible to sell whatever you make because technically some class will find a use for the bonus, however small it is.
There are certain professions that more or less guarantee a consistent in-flow of kamas if you are able to maintain a constant output of products to sell. I leave you to figure out what these professions are if you do not already know.
