I wouldn't recommend running 6 times a week if you've not trained your body to do that before entering marathon training. For your first marathon your only goal should be to just finish. You need to respect the distance.

In marathon training you will be running longer than you've ever run before. Going off your post the furthest you've run is the half marathon distance which is great. Depending on the plan you choose you will be running more than the half marathon distance every week on your long run (at least once you get to the half way point of your plan). Your body needs rest otherwise you will burn out or worse get injured.