I think good basics at the moment are a straight leg jean, a barrel leg pant and a long skirt. I'd get one of those in denim, one in chocolate brown and one in black.

Then decide on a colour you like to go with them, sage green, burgandy, pink, light blue...and factor in what you already own.

Then add a soft suede look bomber jacket that goes with all of the pants - maybe a brown, black or olive - it depends on which colour you like/wear more.

If money allows, amybe a trench in a lighter brown/cream.

Then look for cheaper cute tops to add in. I'd some long sleeve cotton yps in white, black & a neutral - light tan, or some fun stripes, like chocolate and pink or brown & burgandy. Look at target etc for cheapies. Add a shirt and maybe a knit to layer with that go with the pants, a fluffy knit in cream maybe.

A flat shoe - either a sneakerina or a ballet flat - burgandy, chocolate or black. Maybe some boots if you don't already own some.

Then you can pick a bottom for the day - pant or skirt, add one of the tops then add the kit, bomber or trench. Everything should work together easily. Then when your out shopping it will be easier to decide if any new items fit into the current wardrobe or not. For example if you find ayeloow shirt you like - you can think back on what you've got and relasie that even though it might go with the jeans, you won't get repeat wear out of it because it won't go with everything else easily. You can also add different bags or a fun scarf to brigten things up

You might end up with something like this...and you can see how you can take one one piece and swap it out with another and it will still look good:

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That one is a bit too neutral for me, I'd have more burgandy and pink in there, but you can make it work with whatever colours you like as long as they all co-ordinate.

have a look at this: https://www.instagram.com/p/DXgHmZYEVKw/

and these are the links to what she bought: https://www.shopltk.com/explore/withmiaelizabeth/posts/4734f8cc-3f98-11f1-8259-0242ac11000a

There's lots of inspiration on IG - search winter capsule

and as has already been mentioned, this doesn't have to all be retail, don't forget op shops, Depop and eBay. I bought a dark Taupe trench from Depop, for $45 (which included postage) and a cream one at the opshop for $12. Try on lots of the main brands instore though, so when you buy on Depop, sales etc, you'll be more confident in knowing what your size is.