Lower the handlebar. These bikes have seriously good ergonomics. Use it as intended and you won’t have a problem.
Front brake is front hub. Find the arm, connect the cable.
When the handlebars return to earth the gear range will be more functional.
Bike was created in Holland where hills are scarce. Riding that up a hill of any size is not going to be easy.
You do know this beast retails for over $3000? Someone abandoned this? You are sure of that?