In fact, you also said that obesity caused by taking medicine is recovering now, so the first task is fitness.
Losing weight is not completely impossible. At this stage, you can use some appropriate means to help you lose weight.
First of all, refuse snacks, except fruits and nuts, but not too much.
Secondly, eat less red meat and more fish and shrimp. Red meat contains a lot of fat, especially pork, which is high in fat and easy to get fat.
There is also a very old but useful method, chewing 20 times per bite before swallowing, which is very useful!
I wish you good health and success in losing weight as soon as possible.