Doesn’t always work.

It doesn't guarantee people are going to look at you and think you're a 10/10 because some features are out your control, but the difference between being overweight, poorly-dressed with bad skin, bad hair, etc, and being athletic/toned and well-groomed is huge. And while they might seem like superficial things that you feel you shouldn't have to do for someone to like you, they also boost your confidence which tends to make you more attractive as a personality, too.

Also this is likely me problem, but how do you get over people being judgemental in gym (about appearance/phyiscal capabilities)? It often scares me off from going to a gym.

This can definitely take a little while to change your mindset on, but the big thing is just realising that no-one actually cares.

• people are there to work out, not to judge others;
• how much do you judge other people in the gym? Very little, I'd assume;
• even if someone is judging you: so what? Does it actually matter what a stranger who you'll likely never even see again thinks? You're there to improve yourself, not to worry about their thoughts;
• if someone actually comments to you, you can turn it into a positive thing. Tall them you're new to the gym and would welcome pointers. Most people who'll talk to you in the gym are just going to be asking "how long are you going to be using that?" or something similar, though;
• there's a pretty low chance someone will actually be rude to you, because most people are well aware that everyone starts somewhere, and that if you're overweight/unfit then being in the gym is you already taking steps to fix that.

And most of those points apply to a lot of things in life - it's very liberating when you realise that most people don't really care about what you're doing and that you should just do what makes you happy.

If it helps, you can also do some research before using the gym so you're confident about how to use the machines and equipment. It removes that "what if I'm using it wrong and everything thinks I look like an idiot?" aspect for you to worry about.

And if you're just worried about people judging your weight/fitness, you can exercise outside of the gym. Push-ups, sit-ups, squats, step-ups, etc, are all free and things you can do at home. You can probably find somewhere quiet to go for a run - especially early morning or late evening. Dumbbells are fairly cheap (relative to a gym membership for any extended period of time) and don't take up much storage space at home; they be used for their own exercises and to enhance other exercises (just adding more weight to your squats, for instance). Resistance bands are another low-cost, low-space option.

So you can either start off exercising at home until you're comfortable enough to step into a gym, or just keep working out at home and gradually expand your equipment as you see fit. Obviously some of the larger, more expensive machines you find in gyms have their uses - some of them ensure you're doing the exercise in a healthy way, some of them allow you to work out multiple muscle groups at once that would otherwise be difficult (like the rowing machine), and some of them let you target specific muscles in specific ways - but the things I mentioned above can take you a long way.

The two most important things are just being consistent (so try to get into a routine) and making sure you're doing it for yourself. Obviously we're talking about it from a perspective of people finding you more attractive if you're in good shape, but more important than that is doing it because you want to be happy and healthy - if you can become happy and healthy in yourself then other people finding you attractive will follow eventually.

Anyway, this turned into a bit of an essay but hopefully something I've said here has been helpful for you!