Hi Raffles! First of all, I'm sorry that you're experiencing those sensations. I remember feeling similarly a few years ago, and honestly, I still sometimes get those dissociative feelings. It can be really unpleasant and hard to process, especially if you don't have other people to relate to.
What you're saying about feeling disconnected from your body, especially visually, sounds a lot like how I experience dysphoria. I'm an afab (assigned female at birth, if you don't know the term) nonbinary person. I've been out for a few years now, but it took several years for me to even have words for how I felt! I would sometimes wear baggy clothes or a button-up shirt and notice in the mirror that I couldn't quite tell if I looked like a girl or a boy. That felt good, and I didn't understand why until I came across other people describing dysphoria.
I *absolutely* relate to the feeling of "I enjoy this outfit/fabric, but it feels wrong when I see myself in it". I love some traditionally "feminine" things (makeup, jewelry, lots of "feminine" cut clothes), but sometimes when I look in the mirror while I have those on, I feel uncomfortable, like my body isn't actually showing *me*. Sometimes my dysphoria is subtle - I have short hair that I dye because of dysphoria, and whenever I take a while between a cut and/or dye, I feel vaguely uncomfortable and get depressive symptoms. Because hair growth and dye fading is such a gradual process, I often don't realize why I'm feeling bad until I get a cut/re-dye, and then immediately feel *way* better.
As for suggestions, I think my biggest method of dealing with my dysphoria is to just give myself permission to do what I need to. I used to feel silly about needing to change clothes halfway through the day or having so much of my dysphoria tied to my hair. I felt like I should just be able to push through, like I owed it to myself or other people to just make myself get through the day while I felt uncomfortable. That made me miserable! Giving myself permissions to take off what made me uncomfortable, even if I'd spent an hour getting ready, or to buy/wear things that felt like they shouldn't help as much as they did, changed a lot for me. It's okay to do what makes you feel good, even if it seems silly. You don't need to be ashamed of taking care of yourself, and you've got nothing to prove.
I hope my experiences help you at least feel like you're not alone in this!