Hey, so regarding proportions
right now it
s not clear if its a female or make because of his hips. ‘usually’ women have bigger hips and narrow shoulders, with a more curved shape, while men are the opposite. but since it`s meant for a base mesh, you can always tweak that.
it’s hard to tell from this angle and without the hands, but the arms might be a bit shorter then the ‘standard’ proportions. If i remember correctly, the distance from one hand to the other should be more or less like the body height.
hands topology looks good to me, so far, the only thing that pops out is the distance between your fingers, when your fingers are parallel to each other like this, then they should have only a bit of space between them or nothing at all, but might be better for you just to rotate the outer fingers a bit sideways, so it will also be easier to model and skin them.
like Modron already mentioned it could use more detail around the chest, and also you could add more detail in the back, for the tarpez muscles. both should be connected to the shoulder
For a base mesh it`s also good to have more relative similar size between your quads, and keep your edge loops on a nice flow.
you might consider some small tweaking in the shoulder area.