I've been wfh for nearly 5 years now. I can't stress enough how important it is to ensure you maintain your wellbeing. Mentally and physically.
Regardless of the work you're assigned to do for your role, taking regular breaks and keeping active is so important. Sitting at your desk all day isn't healthy but getting up and moving about can be so beneficial. You'd do it in the office so why not do it at home? If you're worried about the time then think about how much work you'd do instead of commuting. It's also not healthy to have so much screen time and video calls without breaks. If you're workplace aren't championing healthy work/life balance then they're already doing something wrong.
Agree with @The Palace Fan about being new in a company and having to work from home. My manager started work and then 4 months later COVID hit so for her getting to know people in the company was made hugely difficult. Even since we started working from home, generally you miss so much of what goes on in the office or for the company, but then that's where good communication comes in from the top. And to be honest because you've got a job to do you kind of get over not knowing (or at least not needing to know) trivial things you usually would around the office anyway.