Bug?: Have flown to Siho prime, current objective marker tells me to fly to Siho Prime. Can't make the ship descend or anything, wondering if game has softlocked. Otherwise it need to be more clear what the next step is once you arrive in a planet's airzone.
Would also suggest, for the tutorial at least, slowing down the natural rate of dirt build up, if not disabling it. Slow learners/readers will find their ship turning red hot while trying to get to grip with the controls; doesn't lend itself to a tutorial.