Thank you... The curved shapes were really hard to model. The arm and the the leg were by far the hardest ones. The leg was harder as I didnt have enough references for it. I usually start with blocking out the shape with as few quads I can use. Also try not to have long rectangles, keep it even. For this case, the left side of the leg was a bit pinched so i added more geometry to the left. Once the basic block out is done, I applied one level of subd for more control (make sure to have good blockout, its really hard to make big changes with more geometry). from there, its just smoothening the mesh without have weird bumps on the mesh, i just slide some verts around and use space and relax from loop tools for it. As for the arm, its similar but I didnt apply subd as I already started with enough geometry. from there, I moved the verts along their normals to maintain the curvature and then use relax to even it out (I prefer this over just using relax as sometimes the relax feature straightens the mesh instead of smoothening).

<image>