Squat down, pull the handles together.
As for the bar itself. Keep in mind that you can get bars with and without rotating sleeves. And I wouldn’t be swayed by high/low handles as you can just use blocks. Another thing to keep in mind is the size of the trap bar. I like a roomy one.
And they’re not just for deadlifts - RDLs, shoulder pressing, shrugs, etc are great with a trapbar.