Robotic Hand - Best arduino model to use? Button presets for hand positions?

I am trying to create a robotic hand that has several buttons for different grips and hand positions.

The way I want it to work is when you push a button the hand moves into that desired position or grip. i.e. Press Button 1 - 1 Finger Point, Press Button 2 - 2 Finger Point, Press button 3 - Thumbs Up

I am unsure which arduino to buy, the coding needed and the additional parts to set up such a system.

I am basing my design on the 'Dextus Hand' as featured on http://www.openhandproject.org/

I am new to the whole programming world and need some assistance. Any help or redirection would be appreciated.

Thank you.

Previous post that might have info.

https://www.google.com/search?as_q=robotic+hand&as_epq=&as_oq=&as_eq=&as_nlo=&as_nhi=&lr=&cr=&as_qdr=all&as_sitesearch=http%3A%2F%2Fforum.arduino.cc%2Findex&as_occt=any&safe=images&tbs=&as_filetype=&as_rights=&gws_rd=ssl