-When he's waiting for the elevator, it's just about to arrive when he gives up. If you know how, I'd try to edit so that the number climb as opposed to him running away when it arrives.
-Watch jump cuts.
-When match cutting, don't let the action dawdle (when she slaps him, too much pause)

I didn't really understand from the film what was wrong with him. Why did he fail? That wasn't made clear for me. Also if there was a threat of being late, we should've seen more time devices or in some way been reminded that it was a race against the clock.

for canon,
16-35
24-70
70-200
easily the most used when I work with Canon.
It's also a good idea to get a couple primes such as a macro (I recommend the 100) and a 50.

Work on peoples' films. Do it for free if you have to. Build your resume then use your connections and sites like StaffMeUp, Mandy and others to find more work.

PAing is a great way to start because it introduces you to 2 important things.

1. Grunt work. This is the often senseless work that PA's are famous for. It's incredibly important, however, because then you can appreciate the work that PA's do when you're higher on the totem pole. There's nothing worse than someone who doesn't appreciate their hires.

2. Best way to learn the basics and get into a department. If you want to DP, camera PA. If you want to Design, Art PA... you get the idea. This way you will also make connections to hire you in the future. When people do their own projects they often hire the people they've worked with before.

For weddings it's a good idea to put together a reel and show it to wedding planners. They're great connections to make for future work.

For commercials, look to fledgling or struggling companies and offer your services. Make spec commercials so you can show them what you can do.

Music videos are easier, go to shows or contact young bands to make videos.

You'll have to do pro bono stuff at the beginning in order to build reel, network and client base. "The first one's free..."

Okay so:

Shutter angle and shutter speed are essentially 2 ways of saying the same thing. They both are how long the frame/sensor is exposed to light. 180° angle (or 1/48 speed) exposes the frame for 1/2 rotation of the shutter or 1/48th a second.

Colour temperature is an entirely different matter and is not something that should be changed instead of shutter angle.

The DP could change for a number of reasons. Lower shutter angles (higher shutter speeds) allow less motion blur and make the shots appear sharper and more staccato. This is often used in action sequences. Higher shutter angles (lower shutter speeds) allow more motion blur and are used sometimes in dream sequences.

Hope this helps

Forgot to mention that you should definitely put the most work into your own film making and crew-building/networking.