Dumb question

for example lets say im a vindicator, does anything change depending on which class i choose first? like lets say i chose inquisitor then at level 10 shaman, instead of the opposite

Your leveling experience for the first few levels, obviously, and nothing else.

Just because you CAN choose second class at lvl 10 does not mean that you HAVE to btw

You don’t have to choose a first class either.