I couldn't exactly explain it well, honestly. I am sure tutorials will be helpful, I've been looking at them a lot. Need to figure out how to add/take vertices from an object. Cuz the eyes have far to many, or the face has far too few. Which ever is easier. Can't find the option for it. Though I highly you have a decent PC, like minimal 4GB of RAM, likely a 2.0Ghz processor (dual core), and a fairly decent GPU. Before diving into, if you are. I use my laptop. It's got 2.4Ghz dual core CPU, 6GB of RAM, and an Intel Radeon 4200 GPU. The best thing I can say is tutorials on YouTube. I wish ya luck if you decide to try it. It's tedious, jsyk.