You want the wing to be just slightly positive to the ground. Sitting on the runway, the leading edge of the wing should be slightly higher than the trailing edge. With speed, it will fly itself off. If it is negative to the ground, with speed it is being forced downward, onto the wheels, and will abruptly leave the ground with elevator input, at a higher angle than you want.
Are you considering learning without an instructor? (I thought your statement implied that.)
John Agnew