Good to see you hear. A good thing about learning HTML, CSS and JavaScript is that all you need is a text editor and you can get going.
I will suggets better options for you, but that can wait. So as long as you have something like notepad or whatever that can write plain text, you are up and running.
If you don't have something, or aren't sure what I mean, email me and I can helpout with that.
Remeber, have fun with it, never get stressed and always ask questions. Even people that have been coding decades constantly ask questions, that is just how it works.