You have never raced before. Your goal is to finish. Depending on where you are in your program, it might take from 12 weeks (runner) to 20 weeks (couch potato) for your half training.
You have never run a half marathon, but may have run 5K or 10K races. Your half training schedule goal is to finish in around 2 hours. If you’re an older or slower runner, you may be satisfied with a longer time of, say, 3 hours or more.