It's not a problem at all. Until 16, school is mandatory. They will accept your child or children at the local public school at any point when you arrive.

Do your children speak English? It can be incredibly daunting to start in a new culture and country, and if it's a new language, it's ten times harder.

We did this. My daughter grew up in France but we moved when she was 10 to California, and even though she was fluent in English, there were some hiccups. My email is in my profile. Feel free to reach out to me.