i cant pick up weapons with E, and the moue wont leave the screen!. im playing on a gtx 1650 ti with 16gb ram with an i5 10th gen.  i dont think i should have a problem

Sorry that this wasn't explained in the game at any point but as it is an early build you need to press middle mouse button to lock the cursor and you must crouch to get close enough to the guns to pick them up