Too opinionated advice on an even worse medium. Please do yourself and the rest of us a favor and open a blog. Reading an article about watercolor basics which is basically a wall of text without a single picture is a pita.
Also some of the advice is just plain wrong. Paper should be the number one thing you shouldn't skimp on and yet you recommend buying cheap/on sale.
It isn't horrible advice: Good paper is expensive and if you can buy it on sale, you most definitely should.
And while good paper will absolutely make it easier to learn, it doesn't need to be the best paper. Just understand that the cheapest paper is usually worthless and that the next step up will cause a few struggles. I'd rather have cheap paper than bad brushes, though. (I learned on thin paper, some of it cheap)
Also some of the advice is just plain wrong. Paper should be the number one thing you shouldn't skimp on and yet you recommend buying cheap/on sale.