For only a couple of weeks of practice, I gotta say it’s pretty good. Definitely better than a lot of other people’s first animations.

There’s room for improvement, like the frame rate. Eventually, try to smooth out movements with some extra frames. Also the movements of the figures are a bit static.

Example: the dude with the shotgun jumping down lands quite statically. If you were to do that in real life, your back would really not appreciate it.Same goes for the default falling backwards.

Also, some parts feel a bit too fast. The fast style works well for action, but sometimes, with a lower fps, it can be difficult to follow. But these are things you’ll automatically start doing once you practice more.

You have used quite versatile stuff, which is nice.
So expand upon your use of effects and the camera. These really spice up animations a lot.