I Can Hear And Feel The Mechanism Working Inside My Mudita Radiant Automatic. Is This Normal?

Yes, this is completely normal and one of the joys of owning an automatic watch. 

The faint, gentle whirring of the movement and the subtle sensation of the rotor (the oscillating weight) spinning inside are tangible proof that the "heart" of your watch is beating. It's a direct connection to the intricate, living machine on your wrist.