We could write pages about this, but to be truly effective when working from home, every person needs three things:
access to the right tools (including high speed internet)
some semblance of a routine (however that might look: it might be very different to what it was like in the office)
a space to work free from distractions, whether that's a dedicated office, the lounge room couch, or a spot at the dining table whilst the kids do their remote learning
The important thing to remember is to always check in with co-workers. If you're struggling, reach out to your manager.