Hey gabri,
Cool character!
If you're looking to animate this; you're likely going to need to splice him up into separate pieces and animate them using keyframes.
(Have a look at Spriter, Spine, etc.)
This is how I would separate the character and upload them into an animating software.
Then you would move each separate "piece" where you like to mimic an "idle", "walking", "running", etc. animation.
Also look at IK. (Inverse Kinematics).