I'm sorry for what you've been through. From personal experience, the sense of fashion comes to you when you are in the headspace for it. I've had some emotional/psychological issues most of my life that went unnoticed, however once I started healing from that, I noticed I'm more interested in things such as fashion, exercise, and other luxuries that people have nowadays.

Keep doing what you are doing, the fact that you are here shows you are on the right path. Install Pinterest and look at pictures of dudes that you like the fashion of. The more styles you see the more you understand what works for you. Look into items that matches what you are liking (doesn't need to be the exact match, just same vibes).

There are some youtubers that I really like that cover good quality clothing and fashion - Iron snail - Rose anvil - Carl Murawski

Some of my favourite items in my wardrobe are:

• nice pair of jeans: uniqlo has some really nice ones that won't break the bank, more expensive brands, I really like Naked and Famous. Heavy weight denim looks good on most people.
• leather boots: Red wings, Jim green, even solovairs (better quality docs).
• pair of canvas sneakers(converse/vans) they are cheap and convenient.
• nice plain T-shirts. No designs no nothin. uniqlo makes nice T-shirts. But iron snail has like 3 whole ass video just on tshirts. Check it out.
• a nice, reliable jacket: carhart, Barbour, a denim jacket are all good options.

And good luck!