Pri

Their actual ass is behind their silk Weavers, and their genitals above that, but it can’t really be a private part because of how useful the silk is.

the prosoma is one forward facing unit but the thorax is dropped down to be vertical. The legs, still attached to the body, now have to be really long. Two middle legs used for moving, hind legs primarily for silk spinning but plenty long for movement, front legs help manipulate objects but can also be used to move, and pedipalps positioned well to become fine moving hands.

That gives them a strictly non humanoid form, but it means they can actually manoeuvre a pole all around their body with their arms. With this body plan, they can bring their thorax back and crouch, looking a lot more like a regular spider with spindly limbs.

Since this is God designed, a muscular heart makes room for more digestive system in the thorax. The “muscles” in the legs and arms can keep a pneumatic style system.