op, don’t wait for the gym as a pp said, and no walking won’t come close.
the issue is if you’ve lost a lot of muscle, and I’m afraid I think it impossible that’s not the case, then your bmr will have dropped significantly. Which means you effectively can eat much less to avoid regain, than had you maintained or limited muscle loss. This in turn means when you come off the jabs, and hunger fully returns, your daily cal intake will be low to maintain your new weight. Does that make sense? The more muscle you have the more cals you burn, as muscle is active, and thus the more you can eat. So you maybe storing up a very difficult situation for yourself in terms of maintenance.
jt is nearly impossible to build muscle in a deficit. Utterly impossible if you’re eating a few hundred calories a day and in a deficit of 1750. The muscle will continue deteriorate.
honestly you need to take action now. This journey is about way way more than a number on the scale or a dress size. And it will take you a long time to build it when you hit goal. And without the help of the medication you’re setting yourself up for an impossible task.
lastly your appearance, as you get closer to goal the muscle loss will become very visible on your body, loose saggy skin with pockets of fat, bingo wings, wrinkled skin, flat bottom, you won’t like it, right now you’ve still got fat padding it out.
so I’d build strength training in at home, you can use your body weight, even doing 15 mins a day will help, follow some video tutorials on line.