First customer (and their problem). I'd recommend 'Wizard of Oz'ing a solution to their problem for them before even writing code, if possible. Consult for/with

First customer (and their problem). I'd recommend 'Wizard of Oz'ing a solution to their problem for them before even writing code, if possible. Consult for/with them for free. If you successfully solve a problem for someone without code first, writing the code becomes a whole lot more straightforward.