So yeah, turns out that under all that fluffy fur it's a bunch of huge beans with skin flaps to protect the claws ๐ฌ. It was quite difficult to sculpt without a ton of good references, but it's pretty close to the real thing at the moment.
The proportions are still a bit off and I'm keeping the fingers spaced out for now; they will be a lot closer to one another in the end.
Now I will move back to the head and start retopology (finally!). I will first make a quick export of the head's current geometry to start working on the fur at the same time.