First thing your going to want to do is get a picture of what your modeling. Use google images or take your own, just make sure its showing all the detail.
Seeing that the beans are somewhat round, you might want to start with half a sphere. Then just fine tune the details and add some texture for a more photo-realistic render.
Awesome man! It will do the start ^^ Thanks a lot. And thanks to GoldenBlueBerry too. Actually I’m new in blender, so can’t get my imaginations far in it yet