Homeschooling child with autism

Hi guys, 
actually the title of my posting says already what i am looking for.

My husband and me have got an autistic child with probably a mental disability. Not sure yet. We are living in germany and my husbands company might send him to denmark. I just started learning about the country but i found that in denmark you have homeschooling which is illegal in germany. So i do not really have an idea how that system of homeschooling works. Can someone help me to answer some questions?

- can anyone use that form of homeschooling or is a certain education required for this
- how does homeschooling work in general? Is there some checking once in a while of the gouverment 
  regarding the development of the child?
- Do i have to register somewhere to apply for that way of schooling?
- is there a useful website to this subject in english?


Thanks to you guys already for your help!