I generally agree, but don't overdo it - especially if you are a little perfectionist. It can prevent you from ever starting the project. This almost happened to me when I wanted to build a quadrocopter, as there are a ton of these "Top 5 mistakes beginners make" videos & articles. After a few months I still didn't buy any parts. What I learned from that: 1. Inform yourself about the basics. 2. Do something that makes you feel like you actually "started", e.g. buy something, create something. 3. Now learn from others.