Yeah, I’m struggling too at the moment. Too many interruptions and distractions at home coupled with a lack of motivation. Recent events have made me think what a pointless job I have in the grand scheme of things and not a lot on the horizon to make that change.
I've been fortunate and have frequently worked from home for around 40 years, either developing software and doing Project Management or developing and giving presentations and training events remotely using various technologies, so I have a vague idea as to what works and what doesn't, certainly for myself.
Now a lot depends on what kind of work you actually do, but as a generalisation, if you've never worked from home before, my advice would be to initially designate a time period for your days at home that closely aligns with what was your normal working hours at your workplace. This is then to become when you are to be considered 'at work' by the rest of your family and importantly, when you are not to be disturbed.
By all means have regular coffee and lunch breaks, but keep them as if you are at your normal place of work.
It obviously helps if you can also designate a quiet room as your office well away from distractions like the TV and also prohibit any of your family from entering while you are 'at work', something that's not always easy at first, especially if you have kids around, but they will soon get the message.
Then set some objectives for the day, plan what needs to be done and how long you think it will take, and then simply focus on the job in hand.
At the end of each day, then review your work and see if you met your objectives and then take account of the results to help plan the following day.
Whatever you do, don't start by treating it as simply a day off from normal work enabling you to do other things, you really do have to be methodical and concentrate otherwise you'll easily fall into the trap of leaving everything to the last minute and the results may well then show it.
But after a while away from your normal office environment and away from the distractions and interruptions to concentration it can bring, you may well find that you start to develop a much better sense of how much time it really takes to do things and you can perhaps even start to relax the regime a bit (or a lot sometimes) for certain jobs. That's when it starts to become much more fun and you can possibly even start to invoice for 5 days work what actually only took you only 1 day at home to do...