Thanks for the feedback, very valuable! An overview screen for the dwarves has emerged as clearly the most missing/wanted feature at this stage so that's what I'll be adding next. I also think tooltips would help a lot so they're now on the roadmap in the not too distant future.
When it comes to mining, most likely the issue was that you only had the one pickaxe to start with so other dwarves set as miners couldn't work. I realise this isn't at all explained anywhere (yet) so it's something else to improve! Similar to the dwarf overview will be something to manage what is to be crafted so you can order up more pickaxes. Right now it's a set number based on your population which isn't ideal, and is very much a placeholder mechanic until the player can manage things.