LL has a million and one options, so there's a LOT you can do here!
In terms of craftsmanship, generally the more like street clothes an outfit is, the easier it is to construct. That's because you can usually find a commercial pattern that'll work, and anything you have to custom pattern gets way more complicated, especially if you haven't done it before.
Things that can be complicated that you often find in LL designs: gradients (you'll probably have to dye this yourself), lots of tiny details (tedious/time consuming), weirdly specific shoes (you'll need boot covers or need to add the details yourself).
There's also always cosplay shops like Uwowo and Taobao sellers if you just want to cosplay and crafting isn't your goal!
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- Director Lucretia (The Adventure Zone) : 15% (Prop Work) Arisia 2018
- Paladin Armor Shiro (Voltron: Legendary Defender): 11% (Patterning) Katsucon 2018
- Arsene (Persona 5): ??% (---) Katsucon 2018
- Uniform (Little Witch Academia): 18% (Sewing) ???