174 may be okay for putters and mids, but could be too heavy for drivers at this time. It's not so much about distance, it's the ability to throw the disc and get the correct flight pattern out of it. But I'v always felt that having discs that are all the same weight is a good idea in the beginning to help develop a consistency in feel.
What has already been stated is true, and it's hard to say without knowing more about your ability. I started out with everything in the 167-168 range, and gradually increased weight. My distance drivers are still in the 169-171 range, though I'm using 180 mids and 172-175 fairways.
It will take alot more wrist strength and snap to get a heavy disc spinning correctly. I would continue to use the Technique section to learn more about throwing, as well as youtube, which is loaded with instructional videos. Stick with what you have for now, avoid the high speed drivers (anything over 7) and develop your form using putters, mid range, and fairway drivers.