Your technique isn't bad. It looks like you could finish a little more with the legs at the top of the 2nd pull. In the first video, you hardly even lift your heels off of the floor. Push through the ground as long as you can. You can see the top of Alyssa's pull in the photo:
The back angle seems okay just make sure that when you're working with the heavier weights, try not to shoot your hips up too fast. Control it off of the floor and all the way through that 1st pull.
Good luck at your first meet. Let us know how you do.