Ewan, we did Pakistan to Australia on the skilled route with three kids, so this is close to our experience. The order I'd use, looking back:
- twelve to nine months out: the visa itself and your trade recognition, because as an electrician your licence may need its own process, and that's usually the slowest part
- nine to six months: the documents with long lead times, like police certificates, birth and marriage certificates, school records for both teenagers
- six to three months: schools, because the teenagers' year level and subjects matter more at that age than anything else
- three months to arrival: housing, shipping decisions, and closing things at home (there's a whole thread here on what people forgot to cancel)
And one piece of non-admin advice: involve the teenagers in something real early, like choosing between two neighbourhoods. It made our eldest feel it was his move too, not just ours.