Not really a mod so no kudosu for this post
I just happened by and decided to tell you some things \o/
Preview time should be set at 00:42:389 - , you can edit this in manually into the .osu file or you can scroll on the timeline until the time is set at 00:42:389 - , then go to timing > set current position as preview point. This way when people want to preview the song, they'll get to hear the exciting part (the chorus).
You should also have some tags for your song, such as Kill la Kill or Studio Trigger, which is the animation company I think.
Also some things in general: Usually you should make the first note in kiai time a new combo to give it more emphasis. For the kiai time I think it's good if you can start new combo every two measures, or every eight beats (which is also every eight white ticks on the timeline). For example, 00:46:324 (10) - add new combo, 00:47:635 (1) - remove new combo and add it at 00:48:947 (3) - instead. You'll find that the combo starts every time the singer puts emphasis on a note, which happens to occur mostly every two measures.
Try asking around in the #modhelp chat channel to see if anyone is willing to help you mod your map. It looks good for a first map, but you still need to work on things like spacing/new combos. Have fun mapping~