10 to 12 months? Really??? You don't have to master the entire program with Blender, only the part that you need for 3D printing. It took me three or four videos (which I posted elsewhere here) to learn the basics, and I was off and making items to print. From there, you can learn what ever else you want, but... it's a bonafide professional program that has a ton of help videos, should you need them.