Hey! I'm a big noob here and know nothing of HTML so please bear with me.
Right now I'm using a premade layout and I'm trying to modify it using the "simple layout maker" but it seems to change the whole page layout when I touch anything in there, even just changing bg color.
Am I doing something wrong maybe? Can I keep the base of a premade and modify it without going through the "edit layout html"?
No, as far as I know, you can't edit the pre-made layouts in the simple editor. Editing the HTML is not that hard, really. In fact, you don't have to touch the HTML at all, just the CSS would be sufficient.