[Normal]00:17:62 (1) - Is too close (in time) to the end of the spinner. (1,2,3) sounds kinda awkward anyway, so I'd delete them, and put a (1) as a slider where (2) was and end it on the blue tick after where (3) was.
00:19:78 (2) - Extrend this to the blue tick too?
00:37:90 (2) - Blue tick notes are usually kinda hard to hit for an easier diff, so perhaps make (1) a single note and then a (2) slider which starts on the end of where (1) ended and ends on the offbeat.
00:46:18 (3) - Would look better in the center of the grids
00:46:42 (1) - Start on the blue tick and end earlier so that it doesn't pop up before you finish the previous note
00:55:18 (5) - Should be fine since it's part of a triplet pattern
01:15:46 (1,2) - This and the following patterns might be a little hard for the easiest diff, so I'd suggest making them each a slider, but I'll leave that up to you.
01:19:06 (1) - Move back to the blue tick and end on the white tick
[Hard]*Perhaps raise overall difficulty a notch or two?
00:43:78 (8) - Move to the middle please
01:19:06 (1) - Move back to the white tick and end on the following white tick
[Insane]***Offset is different from the other difficulties. Fix this :3
00:15:82 (1) - Perhaps silence this like on [Hard]?
00:40:90 (2,3,4,5,6,7,8) - Try centering this pattern better with (3,6,8) in the middle)
00:46:18 (7) - Also move to the middle
00:59:38 (11) - Too close to (10)
01:02:50 (1) - Unrankable. Auto cannot get 2000 bonus points on this (which is the rule). I think this is the only spinner in the map that can't get 2000, but you might want to check each one.
01:15:82 (4) - Too far away from (3)
01:16:78 (4) - ^
01:19:06 (1) - Move back to the white tick and end on the following white tick (and silence like in the other diffs)
*I hear lots of triplet streams/stacks in this diff, which isn't a bad thing, but can make the diff seem overmapped and not very original. Perhaps try changing some of them? :S
*Also, the spacing is very close in this diff. A lot of times I thought that notes were streams but were just 1/2 spaced notes. Using a higher distance snap would really help this.
*Maybe raise overall diff. a notch or two also
Not bad at all for your first map.
Good luck~