My kid has/had what was diagnosed as sensory integration disorder, which I believe may be similar to if not another name for SPD. As I understand it, he was on the mild end of the spectrum.
The biggest hurdle is getting it diagnosed, and getting access to a therapist who understands it. Your schools should provide considerable services. Demand an IEP. My son was enrolled in a special needs pre-K class. Then in regular school he got occupational and physical therapy.
You’ll find a whole bunch of exercises/therapies to do. Some as simple as having her eat cheerios/jelly beans one-by-one, to develop tactile skills. We also spent time “petting” him, just to get him used to the sensation of being touched. And you will choose clothes, sheets, even books and writing paper that she likes the feel of.
For us, writing was a problem. The kindergarten teacher said he did not know his colors or numbers, and thought he was learning disabled. But she had given him a written test and he just didn’t want to write. Orally, he knew them all. That’s what I meant about being a leg up by having it diagnosed.
Apparently SID kids don’t like to reach across their body - cross their centerline. So instead of becoming left or right hand dominant, they will pick up a pen with whatever hand is closest. They also can do an activity such as running, or kicking a ball - but they do it all by consciously planning rather than instinctive reaction, such that running to intercept and kick a moving ball becomes a very complex and difficult procedure.
Your kid will never be a star athlete - at least not at baseball, soccer, etc. But she can get better at them with work. And other activities - such as running, shooting, or bowling, will not require the planning, adjustments, crossing centerline, etc. which she may find different.
Our kid hated lunch and recess, as they were too hectic and noisy. Which caused social obstacles.
Many people would say they did not notice he had any problems. But they wouldn’t realize, for instance, that he fell down on a daily basis, simply because he did not think to lift his foot high enough over a curb or step.
Over time with a lot of work he’s overcome or learned coping mechanisms for just about all of his problems. He has his driver’s license, and is going to college to study engineering next fall.
Like I said, he was on the mild end of the spectrum. But let me know if you have any specific questions.