EDIT 2 - Added that yellow half-star? piece that suppose to be on the front of the hip.
EDIT 1 - Just updated the right arm so the joint will actually fit inside.
Been trying to get some hands-on experience with several 3D modeling software and thought it would be best to start with working with some existing objects.
Recently got into those Gunpla modeling kits and saw someone posted a RX 78-2 model so why not throw that model into MeshMixer and recreate the famous final shot scene.
Please keep note that this model was just cut apart and rearranged in MeshMixer without refining the contact areas so use of cutting, sanding, and filling areas with filler or hot glue may be required. However, that should give you more freedom to adjust the pose into something you prefer.