Truss Analysis : Method of Joints only (Picture provided)

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EdajMay
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Hello, In my statics course, we had to design a bridge, and now, I have to calculate the internal forces in every member of the truss. At first, I have found Ay and Oy with the moment of force, but then, I am stuck since the truss is not perfectly aligned. Sadly, I can't use the method of sections.

UJgAGbC.jpg

Could you help me please? Thanks
 

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You are not consistent with your signs. How can Ay be greater than P? Do you know the right hand rule when taking moments?

To get the other member forces, can you start by taking equilibrium of joint A or joint B?