I guess there won't be much to know about it until we start talking together. You were always decent at transfiguration - I'll let you take that piece. I'll cover potions, and I could cover defence against the dark arts. Lily could help with potions, and charms, Remus could help with defence as well.
Those would cover probably the most important pieces, to be honest. Herbology maybe - that might be the other one.