It's too late by 9th grade to join any youth leagues, so your only option is travel lacrosse. I would think that there are still a few clubs who would take on a new player. Don't expect to much here.
Get her a quality stick, doesn't need to be new second hand is ok. She needs to practice the basics.. A lot.. It's good to be fast but catching and throwing are as important.
Watch some YouTube videos of wall ball and she'll need to do that everyday..
If she puts in the work she be ready for next school season