Good tips, but I strongly disagree with your second point. Yes, there are crusty old devs who refuse to learn new technologies and techniques, but one of the best ways to learn is to find a mentor. Learning web dev is very hard because you have to really learn at least three technologies at once to make anything useful (HTML, CSS and JS, plus something server-side or graphic design).
As someone who frequently helps people learn web development, countless times I’ve seen people fail at the getting started phase and they need someone to ask for help. StackOverflow and forums are great if you know enough about what you’re doing to phrase the question. Sometimes all you know is “it’s broken.” Having someone you can sit with and say, “what’s wrong here?” is extremely valuable.