With 9 years of experience in programming. What is the biggest beginner mistake in programming.

The biggest mistake in programming is to start at all before you own a small piece of land, atleast a forresty quarter acre you can get for 8k paid monthly $200 and get hatchetting the trees. After that you get network access to your property from local authorities and than only than you can start programming, take my word for it or go the long route and study before you own land.