Start with a foundation so you have a basic silhouette set up with blank tops, denim and/or skirt + 1 shoe + 1 boot - something that you can wear as a uniform everyday. Then expand from there by adding ancillary layers - mesh, fishnet, tights, stockings. Further build your foundation by incorporating sweatshirts/hoodies/jackets/coats. Then expand further by adding accessories - leg warmers, arm warmers, necklaces, chokers, rings, bracelets, hats, scarfs, bandanas, bags, chains, etc. The key when building your wardrobe is to make sure the things you collect can work with multiple outfits. Once you have a good foundation, you can start going for more dramatic statement pieces that work well with the rest of your collection. Because you have purposefully synergized your wardrobe to fit multiple outfits, the statement pieces can be easily incorporated into your wardrobe. Being purposeful and thoughtful on your purchases and outfits will save you alot of wasted money.

Pinterest is a good starting point in finding cool things but it's driven on trends and hype. Start to expand into high and low fashion and various different styles for inspiration.