Hi
I have three kids and homeschool. In answer to some of your questions.
We are a christian family, but I teach my children about the 'Theory' of evolution as I believe it is important for them to have all the available info and to come to their own conclusions.
As far as other religions go - I went to school with kids of lots of different religions and I never really learnt about their beliefs from them. Most or the kids tended to keep their faith private especially if it was a bit different from the norm.
I teach my children about all religions as I want them to understand other people and respect their beliefs.
Sport - My kids go to ballet lessons and play sport with their friends. If you want your child to learn footy or any other sport you can enroll them in a footy team on the weekends with other kids.
Language - There are alot of really good language programs available or your child could do an evening course at TAFE.
Sex Ed - I would much rather teach my own kids about this than have them listen to all the 'stories' that go around a schoolyard. I showed them the video "where did I come from" and that was enough for now. When they are older I will give them approriate reading material and talk to them about it if they feel comfortable doing that.
Excursions - We belong to an active homeschooling group that arranges excursions on a weekly basis. We have been to several Science Days and many other varied activities.
Homeschooling kids are generally Very busy with extracirricular activities, my kids also go to art and piano lessons.
For homeschooling you can either buy a pre packaged cirriculum from a private company or make up your own cirriculum, as long as it meets the requirements set by the Education Authority in your State.I like to make our own cirriculum as I can cater to each of my childrens individual needs and interests. Homeschooling certainly isn't for everyone but many families find that it is the best thing for them and their kids.
Regards
Lisa B.