I’ve worked from home since 2006. I log on at 7-7:30 and get the day over early (flexi time) I put the radio on as isolation is a git. Always walk away from the desk every hour, wash up to keep your hands warm, hoover up to get exercise. Don’t drink too much coffee or alcohol. Try to get out at lunchtime or faff about cooking your meal to get a break. Enjoy not commuting, wearing works gear but remember you are at work.