A lot of it depends on how your lupus presents, as well, which is why it's important for your doctor to give you some guidance. Whatever activities they recommend, be sure to take it slow and build up very slowly (slower than you think you need to). And make sure you stay out of the sun! Swimming or walking in the water might be a good option if you have access to an indoor one (and if your doctor clears you). I have several family members with lupus, and they have been able to swim, box, row, strength train, and do workout videos. Again, everyone's experience is different so let your rheumatologist be your guide!
Healthy choices and actions have positive impacts, even if the scale doesn't move!
I totally agree with both prior posts about getting a doctor's clearance and probably a referral to a PT. That said, once you get that, it is never too late to get back into exercise. So many stories here on Spark from people who had serious medical issues complicated with obesity have been able to slowly get into an exercise routine and regain a healthier life. It may take time and it may go slowly, but it can happen.
Really it is never too late.
Persistence is more important than perfection.
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I agree with the previous poster. The best place to start is by getting clearance from your doctor to start and exercise program. They should also be able to give you advice about what exercises are okay to try and how you can go about progressing them safely, given your medical condition.
"You may have a fresh start any moment you choose, for this thing that we call "failure" is not the falling down but the staying down." Mary Pickford
"No matter how slow you go, you are still lapping everybody on the couch."
I am sorry to hear about your Lupus diagnosis. Honestly, the best place to start with exercise would be to speak with your doctor and get clearance for exercise. A referral to a physical therapist may also be beneficial.