There's a quote that someone has as signature here, I can't remember who or who the quote comes from, but it's something like "sometimes the easiest way to get a hand-drawn look is to simply draw it by hand". I think if you draw this with an ink pen, scan it, place it on the texture, and add the labels, you'll get the look you're after. Like Fabio, I think you've captured the atmosphere perfectly, and the layout looks good. But getting a medium to look like a fundamentally different medium is among the hardest things one can do