I don't know if people mentioned to you yet but you said you had trouble to keep moving when you have to let go of the W key, there's two tips i can give you about that.
First, try to never let go of it. Press W with your middle finger and use your other 4 fingers while holding down the W key, after awhile it comes naturally.
Second, if you absolutely must let go of the W key, and want to keep moving, press Left and Right mouse button at the same time. You can still pan around your vision, and it works just like the W key, you'll keep moving foward.