Threaded soft metals should always be started by hand. Once the threads are mated good, then continue easy until the proper torque is achieved. One nice thing...you don't even have to jack the car up. The most difficult part of the entire job is lowering the spare. However, some say you don't even need to do that step. Lowering the spare gives you plenty room to remove and tighten both bolts.
Sorry you cross threaded the bolt. But it is an easy job.