Would taking all of these neurological dietary supplements help or hurt me?

That is a lot of stuff to be taking. You should not be taking all of these without talking with a doctor first. And marijuana should be out of the question 100%. If you want to improve your health, improve your mood, and enhance your performance, try eating a balanced diet that includes a lot of fruits and vegetables, and exercise for 20-30 minutes every day. A simple 20 minute walk will improve your health AND your mood at the same time and it is much much safer than putting chemicals and other pills into your body when you don't know the side effects.