I'll echo what others are saying. Nice first attempt but it's missing a lot of basics (And obviously more nuanced things as well).
Things it could benefit from:
1) Overlapping action
2) Squash and stretch
3) Attention Timing/Spacing
More nuanced things I see that are problems:
1) eyes move un-naturally (should be quicker)
2) Lot of "popping" in the shoulders
3) Needs "Moving holds" (arms are perfectly still for much of it)
These are all things covered in books such as this, that I would highly recommend.
Don't be discouraged, you have a good start... but there is a lot of art and science to animation that's been established for over a century (Disney etc) and there is no point re-inventing the wheel. It's well worth your time reading up on it.
Keep at it!
Visit them both, look for pros and cons on the schools, courses and life after school.
From experience, most (if not all) 2d animation studios in Metro Manila are quota based work, meaning you get paid for the amount of scenes or frames you do. 3D gets paid hourly, afaik. Either way, be prepared for long work hours.
I bet the Multimedia course has animation subjects on it.
If ever you want to study animation on the side, look for these two books.
Mahal, alam ko, pero may paraan naman. I have it on my hard drive (wink, wink).
Most of the points from the article seem to be derived from the stuff the book covers in more details.