As soon as I leave home in my car I am going to go ahead and open up a can of beer.
That does not sound like a great plan. Drinking while you are in the car isn't smart.
I've been intending to do this for a long time
Drinking while driving a car is illegal. You will get a hefty fine with possible jail time if you get caught. It's also dangerous, and can make you cause an accident.
Careful driving is highly advised.
Drinking alcohol in the car is not going to be determined as careful driving. Make sure you are careful when it comes to the laws of driving. In addition to being fined you could also get your licence taken away.