Everything depends on genetics.

If the puppy coat is really troublesome, you can trim. I trimmed Max until he was 6 months old because I thought I wanted a puppy cut. He looked like a cute muppet for a long time.
If you click on my profile page, you can see what he looked like when he turned 1 year old. He had fairly good hair length. His head did not really begin to clear in color until he was 2 years old. The lines in his lineage tend to be darker longer.