@lwr70 Yeah, my doctor recommended I cut back on dairy. Skipping breakfast really takes a toll on my energy levels, I've noticed. I'm not intentionally skipping meals, though. As I mentioned, I usually only eat twice a day, so I end up around 1300 calories. My TDEE is around 1400 calories since I hardly work out, so that definitely plays a role. You might think 44 kg sounds too light, but with a bit more fat, I don't look starved, actually look pretty fit and healthy.
@kafs Ohk in that case I'd say, after you start the gym maybe go for a clean bulk for a few months. Bulking and strength training will help you gain a few muscles and increase your strength.
Then after that, you can start cutting.
Since you are already low on energy and lethargic, going caloric deficit would just exacerbate things.