Right hand thread/left hand thread 68 charger????, pressed on drums?????help!!!!!!

If it is original then the drivers side is left hand thread.

If the spinning stud is on the front..... do this.
On the front wheel take the grease cap off, remove the cotter key, nut, washer and pull it off with the wheel attached.

The drums can be a bear to get off the hub. I usually soak them in PB Blaster and then try to get it loose. I have had to use heat to get some loose. I had one I never could get off so I bought another hub.