Just as Tesla figured out rather quickly, making an electric car is the easy part, and Apple will need to figure out a lot more, including how they're going to service vehicles and the more importantly the charging network, even if they're only going after low volume / high value sales initially.
And for those half-jokingly suggesting the Apple Car will sell for $150k or more to start - there is almost zero chance they'll be priced that high. It would damage the Apple brand to only have an aspirational vehicle. Just think how they sold the Watch to begin with. Yes, you could get an actual gold Watch, but you could also buy an aluminium version for a fraction of the price. If I had to guess, we'll probably see 2 or 3 versions of a vehicle with pricing starting at $60k, going up to $100k, which puts it in the range of other full electrics, not to mention tons of other higher value brand vehicles. The fact that pickup trucks are selling for $50k-$100k today, that are basically the same box framed, IC engined, empty box bed that they've been for the last 60+ years, shows just how far up the price ladder manufacturers have gone already.