the only thing I really do to look after it is making sure my keys go in a separate side pocket in my bag so that they aren't rubbing against my wallet.
Yes, just use it! I thought mine would scratch easily as well but it's still in perfect condition, the only thing I really do to look after it is making sure my keys go in a separate side pocket in my bag so that they aren't rubbing against my wallet. I think lambskin can withstand a lot more wear and tear than you'd think!