@RemusLupinsBiggestGroupie
Navy and black can actually look really good together. It helps if it's different textures/fabrics - velvet and silk or silk and leather, for example.
I agree with this. A black jumper with indigo jeans can look really chic.
I used to have a short navy tweed jacket with a black velvet trim on the collar which was lovely.
Also, black and brown can work if it's not a dull brown. Black jeans with chestnut brown suede boots for example.
I really like your denim dress OP. Would it work worn open and loose too, instead of a long cardigan, over jeans and a longish t-shirt? Or with a belt and your boots and opaque tights it would look good.
And your tweed coat is lovely. It gives you a very flattering slim silhouette. You say you've ordered brown (Chelsea?) boots. And you might be getting nice new slim/straight jeans to wear turned up with them? All you need then is a nice jumper to wear with them under the coat. Maybe cream rib, slightly chunky if you think that would suit you?
I also liked your long black floral dress. It would look good with chunky black boots. And might work with a cropped black jumper over the top so it looked like a maxi skirt?
I think you have some nice basic stuff in your wardrobe to work with, if you just buy a few bits to update them.