Welcome to the site.
Headlights and buzz. I haven't had that problem, but maybe someone else has.
Steering - Is the resivor full, and is there any sign of a leak? I would check the o-ring and see if that helps. I have seen some on them like there was no power steering at all and after replacing the o-ring, you could turn the wheel with a finger.
It takes more than that for the seat belts to lock up. I wouldn't worry about it. If you are on a slight hill, sometimes they will lock up. It is hard to test them.
Good luck.