Mastering JavaScript isn’t easy, but getting started is simpler than with other languages. You are not dependent on a certain editor and you don’t need to compile it to create something that can run. Most important of all — you don’t need to spend any money to get started. Browsers are free. A lot of editors are free and many even open source. Above all, documentation is online and available to you.
I’ve been working with JavaScript more or less since it has been around and I’ve been carrying a lot of ballast with me.