Nothing special tbh just clothing which are free. People barely look at others in the gym.
I wear tracksuit bottoms, blue sports top and trainers (with comfort insoles).
Don't worry about how you look like. Start small, build up, have fun, feel good!
Wax your legs and your chest hair, but be sure to wear a sweatband and one of those pornstar moustaches at all times. Get some really skimpy short hotpants for extra movement and wear a string vest, the less clothes the better. Put some lube on your nipples to ensure you don't get a friction burn and keep your socks pulled up to your knees at all times.
Don't worry about it. Wear anything that is comfortable and allows you to move. You can go full out and wear a tracksuit or keep it simple and just wear some shorts/sweatpants and a T-shirt. For shoes, simple trainers are fine, something that is comfortable once again.
If you plan to do heavy lifting then consider knee & wrist straps and sleeves. They help to support your joints so you don't end up spraining something or dislocating a joint
Shorts or Tracksuit bottoms and a T-Shirt or a Vest. Gym gloves also a recommendation along with a small towel to wipe the sweat off yourself and the equipment. Any decent running trainers, I just rock with my old pair of Adidas kicks.
It's not really a fashion contest, just wear stuff that allows you to move freely and you wont mind getting sweaty in.
The reason I'm concerned about gym gear is because the gym in question is quite rough and is filled with muscle heads..so I really want to stay out of their radar by not standing out.