😩 the problem is not where to get them... It's whether you have money or not 😭😭😭
If I had money... I'd totally go for Ralph Lauren vibes. But I don't soo 🤣 H&M isn't bad, Bershka etc. but it's more so what you do with the outfits you buy than where you buy them.
Honestly, my advice is to build up a wardrobe of basic necessities. E.g. plain black, white, monochrome tops, vests, shirts etc. and basic jeans, leggings, whatever other style of pants u like.
Now, buy a few "statement" pieces, if you will. These encompass colourful/ patterned / interesting pieces, like tweed jackets, blazers, cardigans, bags, jumpers, skirts etc.
The most important part to looking put together are accessories. Sunglasses, bracelets, necklaces, chokers, brooches, headbands, cute bags, keychains etc. these can really "up" a basic outfit.
The key to putting together a good outfit is to layer and accessorise. Start off with you basic pieces. Choose a statement piece, or not, and accessorise.
Make sure to have some comfy clothes too. Hoodies, joggers, sports clothes etc.
This is just my opinion thoo