@nickale I think it would help you immensely if you can afford to invest in an elliptical machine. It would be easy on your joints and you could put on a good sweat.
Also, any kind of low impact cardio excercises you find on YouTube is something I would recommend. I used to experience problems with my joints and so I would do low impact hiit videos from Madfit channel on yt.
I would recommend for you to set some non weight-related golas such as improving flexibility or something like that. You can try to get into yoga if you're able to or learn how to twerk or find a dance channel on yt that you like and try to learn some of their routines. And then workout twice a day - once just for burning calories and getting that heart rate up and then once for reaching your goal of choice. Sitting at home all day greatly lowers your daily caloric expenditure and so working our once a day may not be enough to keep up usual eating habits.
Also, one more advice. I strongly advise you to try to cut out added sugar from your diet completely. There is research to support this approach - it is likely that your intense cravings (if you have it) will calm down. Doctors sometimes advise patients to try to cut out sugar, like mine did, but it is far more common that they will prescribe birth control pills and there are numerous business-related reasons for that. I mean, there is literally nothing bad that can happen if you try it for a week or two. And then if it helps you that's awesome. This is a great period to try something like this because you don't eat out or go out with your friends so there won't be many 'temptations' along the way.
This all is just something that helps me, I hope it helps you too