Wind turbine design question
The torque needed to move the generator shaft depends on the electrical load it has to supply. The higher the electric load, the harder to move.
It will likely move with no load (supposing it is able to overcome static friction), when you start to increase the electrical load, the speed will start to go down (assuming constant wind).

The exact manner in which this happens depends on the speed vs. torque curves of the generator and the characteristics of the turbine. If you lack this information, then you will have to make some experimental tests.