Long wait?
I ordered my car in February - its build date is June 12th.
It looks like you have 3 weeks to wait before it starts being built and in fact it may start being built sooner as the status updates around 3 weeks before in most cases. Although no idea how the change to 2018 models at the start of next week will effect that.
I ordered mine two weeks ago - dealership used a stock car they ordered in February but hadn't been built yet as my order, just changed the spec to my spec, so it cut my wait time down a few months still feels like a long time though,,