Okay cool, so no 3 axis gyro on this thing.
Go into your DX8 and go to Servo Setup. Select travel and look at aileron, elevator and pitch. They should all be at 100%. If they are not, put them at 100%. Also, you can push the roller and hold it then power on the DX8 to access the setup menu. In there, under your helicopter model, select swashplate. You should be on 120º 3 Servo. Let me know if this helps.
And no worries. Forums can be challenging for those just getting started in them.