🙄at the pp saying you need to be tall and thin with perfectly-coiffed hair. As if you can't look good unless you're mincing about like Kate bloody Middleton all the time.
I get you OP, it's taken me decades to work out how to dress in a way that makes me feel good, despite having lifelong interest in clothes, costuming and fashion. My mum wasn't good at that stuff, so I was just left to my own devices to dress most of the time.
I'm always learning (and making mistakes), but for me it is about clothes which make me joyful. I am scruffy-lookin' and my face gets ruddy and sweats easily, so no amount of primping is going to turn me into Kate (and christ, how dull anyway). Besides, it's too much faff and inappropriate for my lifestyle.
I have a simple haircut that suits me and requires little to no styling. I do like to paint my nails, because it's fun, and I enjoy make-up but don't wear it often. I look after my skin, but don't go in for all the potions and serums that are around now (I am admittedly blessed with good genes there though).
Clothes - I start with garments that make me think, "yes please, I want to wear that!", and build outfits around them. I'm tall, broad-shouldered and muscular, carrying a shade too much fat, but I don't care to lose it (I'm healthy, who cares?), and I need to be able to stride and have the full range of movement in my clothes, or I don't feel myself. I go for relaxed cuts and loose, flowing fabrics in natural fibres. I love strong, bold colours and sometimes a bit of drama.
I pretty much know what silhouettes and cuts work for me now, so I can pick and choose which elements of current fashions I want to add to my wardrobe. I don't spend loads—I use Vinted a lot to buy good quality things in brands that I know fit me well. I don't have a lot of clothes and shoes, as I find it a bit stressful to have too much choice. Same with accessories—a few good pieces that work with multiple outfits. If a garment doesn't work for me in the way I imagined, or if I'm not wearing it enough, I put it on Vinted and chalk it up to experience.
I would start with finding some clothes that make you feel fantastic @Bennettfan, and analyse what it is about them that brings you joy. If you feel good, you'll look good.
And I second the pp suggesting Pinterest to work out what looks good to your eye - create a few boards (Spring/Summer, Autumn/Winter, Formal/Glam) and pin everything that you like the look of. You'll start to see patterns and the algorithm will throw up interesting suggestions.