The arrows are pointing out the dust (sand) bunnies.

If the photo was a keeper (for example, if you'd whistled and she turned to look with a bright smile or an interesting expression it might be a keeper) it would be quite a simple task to clone them out. As it is it might be worth doing it for the experience. The composition in this one isn't bad, you have more room on the right, the direction she's headed and she's at about 1/3. Google
The Rule of Thirds.
Generally, all the photos without faces are uninteresting to anyone other than family. The one with the two boys and the tortoise is a little bit interesting but is still family album only; as is the boy with the goggles. Hubby behind the bush is the same, I get that he was using the bush as a moustache.
The boy in the reeds has the most potential but even so, he's centered (better if there is more space in the direction he's facing) and though the pose is OK he just looks bored!
Homework. You've had several suggestions, read up on them. When you've done that go out with your camera and a not too reluctant model and take 100 photos applying what you've learned, that shouldn't take more than an hour at most. Then come back to your computer and select
ONE of them to post back on here for comments and criticism. Throw the rest in the digital bin.
Remember that this is the digital age, you don't have to pay for film or developing.

The difference between a great expression on someone's face and a blah expression can be a nano second.
You may find that when you start to produce photos that make them look really good consistently your family may be a lot less reluctant to model for you.
Criticism here can seem harsh but if you can take it on the chin and learn from it your photos will improve. I've learned more here in the last 3 years than I've learned on all the courses and workshops that I paid for.