Hi Catarina,
From the image you shared before, I thought you had some protocol for measuring and specifying movement. This is why I suggested you to create some reference nodes and drive them. Please note that there are different ways to drive a model. You can drive a model without markers as well. You can use AnyKinEqSimpleDriver. The problem with using marker driver is that you don't have any input data, so it is a little bit of an overkill if you have to invent some marker data first and then drive the human model using AnyKinEqInterPolDriver. You can make some reference nodes on the human segments and drive them using AnyKinEqSimpleDriver.
I am sorry I may have misunderstood how you want to drive the model. If you simply want to do some standard joint angle movements, like bending the arm, then using the mannequin drivers is the best approach. The model already has the standard body joint angles that you can control.
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Best regards,
Dave