Hi IFNBLizzardOwO!
Welcome to the skinning forum. Here, you can discuss anything related to skinning, finding a perfect osu!skin for you and share your creative osu!skin.
I could suggest you to try this out:
community/forums/topics/606260It is simple but there are lots of designs you can choose from. Not only that, there are all 4 modes together so you don't have to choose another skin when playing different modes.
Edit: This is one of the first few skins I had even started osu!.