Ah I see, gear changing works via right-click context menu on the items and then mining is just pointing your ship at an asteroid and firing. I'll expand the tutorial a bit more for next dd.
The asteroids outline is a known inconsistent graphical issue I forgot to add to the list before publishing, I know it's just a cosmetic thing but in retrospect I can see how that'd be very confusing to anyone else.
Thanks for trying it out and for the feedback on where you got stuck.