00:00:516 (1) - Similar to #4616190, you could use more simpler rhythm on Easy like 1/1, and gradually add some 1/2 on Normal, then more 1/2 on Hard. For example, 00:03:759 (4,5,6) - 00:18:353 (2,3,4) - could be replaced by an 1/1 reversed slider, and 00:16:732 (5,1) - could be replaced by a simple 1/1 slider.
00:30:595 (3,1,2) - It's good practice to have sliders flow into the following object for lower difficulties, instead of having them point away.
00:37:977 - maybe making 00:38:134 (2) - starting at here is better at covering both vocal and drumbeat
00:44:417 (1) - slightly louder hs is in order, doesn't really provide much feedback. works for higher diffs but i think a new player would find it strange if they click and no sound comes out
00:46:302 (4) - This slider is a tad complicated. I'd probably do something like this https://osu.ppy.sh/ss/19329384/7c19 instead to make the sliderpath clearer. Having the slider curve into itself can be strange for a new player. Remember, you're making a map that someone is probably going to play as their first ever playcount.
00:53:213 (7) - Probably best to make this a 2/1 slider instead.
It doesn't go particularly nicely with the slider following it, and the rhythm could also just work better as 2/1 instead.
Maybe something circular so that it flows nicely into the next object? https://osu.ppy.sh/ss/19329391/8036 Copying and flipping the following slider and making a cute pattern like this would be good perhaps?
01:16:145 (3) - maybe deleting the note here is better because you followed vocal only in similar section 00:55:726 (3,4) -
also for easier rhythm density