Branding takes time and is built in stages.
You need to stablish the vision and set your daily pace as you work on short-term goals that'll move you towards that vision. Brand building should be enjoyed and not endured.
The process starts with:
Your brain waves, a pen, a piece of paper (or your laptop) and a cup of coffee or tea. I add the drink because it allows you to keep yourself hydrated, which obviously helps your brain.
So what do you do?
Just. Write. Things. Down. Then? Let the good times roll with research! Research everything you can to be as well versed as you can about the industry you're about to go into.
The biggest key to building a successful brand is placing an intentional focus on a handful of small, actionable steps towards what you believe in, every day.