Adopt older orphans
If you are trying to adopt a child and you see a child ten or over consider adopting that kid. I realize that most people want infants or toddlers but when these kids reach 18 they are often put on the street.
A lot of homeless people grew up in an orphanage and no one wanted them because they weren't cute small cuddly kids. They were approaching puberty and young adulthood.
I saw a 19-year-old boy with bad teeth who had been raised in an orphanage. There are few if any government programs to help these young people.