Nervousness is nothing unique to your situation. Many of us experienced the same things when we were learning. When hitting to the green, I would imagine your nervousness is more excitement than actual nerves. The good news is it will pass.

I would adjust your practice to reflect 75% iron shots (5, 7 iron and wedges) as these GROOVE the swing and are much easier to control. The remaining 25% can be with woods but I would put the driver away until you can make clean contact and find the fairway more than 75% of the time...at that point, you are getting to the point where you will begin to see some benefit to hitting the driver over the 3-wood. Even those that hit the driver long right from the beginning would benefit from following this practice because always remember 220 down the middle beats 300 in the woods every time.