The biggest downside to group lessons is that you lose much of the individual attention you would get in private lessons. Also, the lessons will most likely not be tailored to your needs because the instructor will need to cater to the majority. Even with these potential issues, you will probably find these lessons helpful because driving is something everyone wants to do better, so it will probably be covered well.
The other dimension is measured in degrees measured from the ground. While this dimension is important for distance, it is less important in accuracy. Of course, in improving your game you will want to improve your distance along with your accuracy, so you should keep this in mind.
The third step is to check your takeaway. It's easy to take the club back inside because it feels comfortable. This is a dangerous mistake. You will come down through the ball from the inside out. You will either hit the ball straight to the right, if your clubface is square, or hit a hook if your clubface is facing the target. If your pattern of misses is either straight right or hook, you're beginning your swing by taking the club back too far inside.
So again when we go to play at a course we should get there early & avail ourselves of the chipping & pitching practice facilities that are available. Most courses have some sort of a practice ground but the standard & scope will vary.
You can determine which it is by watching your drives. If you typically hit a curve ball, one that starts out straight then either hooks or slices, you need to work on the club head angle. If you hit a straight shot off to either the left or right, your swing path is the most likely problem.
One common mistake made by golfers at almost all levels of experience is that they try to clobber the ball, especially from the tee. You will find, however, that if you slow down your swing just a little, and keep your motion smooth and steady, you'll hit the ball straighter. As you improve, you can begin to swing faster, adding more distance to your shots, but in the beginning it is more important to hit it straight.
Let's look at the ball flight laws that cause the ball to curve right-to-left. The cause is quite simple. The clubface is closed relative to the path on which it is traveling. The degree to which the clubface is closed determines not only the amount of curvature, but in combination with the club path, the initial direction the ball leaves the clubface.