Is this your first skin? If yes good try. But as most of first ones, this skin comes with many problems.
First of all the main problem is proportions and positioning. Most borders seem to have a weird outline to it. As a cause it can have many reasons, for example the resolution got badly executed due to resizing and filesharing.
In positioning the ranking panel is a perfect example for it: Rankings Numbers and more are offcentered. + the whole thing looks pretty empty. As a solution you could take a template for your skin that has the correct size and that didnt get resized for its originality. Another striking mistake in proportion is the hitcircle and its hole in the middle.
As for aesthetics your skin has a lot of good features but in some parts the text is not visible due to its thin border and the opacity of the background (e.g. song selection screen). In generall try to use visible colors without that much fancy mixes in colorbrightness even tho in some situations it can be beneficial. Just take your time. Always remember 80% of the game has a black background. Use a black backgound in the editing software it can help.
btw. your spinner is not yours and can easily replaced. Only 100% original made skins are allowed here. For more information check out the rules.
but nice try to far.