Welcome onboard Burners! You can start with the front wheel hub! I've modelled only couple of simple parts at the moment. There will be a list in these pages later on about what is done and what is under modelling and who is doing those.
At the moment it's enough to have correct geometry, so somekind of "space allocation mock-up". Then later on we can detail the models further and get accurate models, which can help in weight reduction etc. But you are correct, at the first stage it's more important to have correct geometry!