In case you don't know how to start, you will find everything you need to know here.

Move your player with WASD, attack with your left mouse button and block while pressing "e".

Throw your weapon with right mouse button(hold) + left mouse button(click).

Change your perspective by pressing "c".

Pick up weapons and shields by holding the right mouse button and pressing "q"(Shield) or "e"(Weapon).

Use or leave ranged weapons by pressing "g".