Here's the thing, the main thing, actually, to bear in mind for big, important decisions. The ones that deep down scare and thrill you all at the same time: The more you love your decision the less you need anyone else to approve of it.
Putting our own mental and emotional energy into getting clarity on our own approval is far more rewarding than pouring it into seeking that of others.
If you love what you have chosen, if it feels completely right to you, the less you need anyone else to concur. Of course it's lovely if they do and that's the ideal, and of course some support along the way would be most welcome. But don't not do the thing that is right for you because "everyone" isn't in agreement.
What will make you love your choice more? Put your energy there. Put your focus on it. Whether it's doing more research, or hanging with people who have chosen that course of action before you, or putting in place strategies to allow you to roll your decision out one step at a time. Own your decision. Put your energy into your own surety.
It's good to know that we generally want to convince other people when we are actually unsure ourselves. By convincing them we also want to convince ourselves and that's a risky policy. We need to put the energy towards our own clarity, not others' conviction.
The more you love your choice the less you need other people to.
The irony is, of course, that once we are committed and sure, the people we care about will more than likely support us anyway. The powerful energy of our passion and surety will shine through and draw them along for the ride.