There is some limited support for keyboard hotkeys already, most notably for tools. You can change their shortcuts by going to the Edit menu, Preferences and clicking on Shortcuts. We plan on improving customizable keyboard shortcut support in a future update!
Although there are hotkeys, they don't work well for me. For example, if I want the eraser tool while I am holding the pencil/brush tool, then I press E to change my tools but when I release that E button, the tools should change back to Pencil/Brush just like in Krita when you press E while using the brush, it only switches to eraser until you press the key, after that, the tool reverts to Brush.