My son , 11, has been on soccer teams since he was 5. Last time there were a couple kids who had never played. They are all in 5th grade, they lost every game but they all rallied around the new kids and it was great fun for all involved.
It all has to do with the coach. He can make or break a team.
My daughter has never played an organized team sport, she swims, but has never played soccer, volleyball, basketball, softball. She is homeschooled and next year will go into the high school where she will have to take gym class. Talk about throwing her to the wolves, lol
Your daughter will be fine.