i think this 00:20:521 (1) - should just be a 1/2 slider followed by a circle, to both represent the drum at 00:20:693 and make 00:20:779 an active rhythm, but works the way you did it as well.
https://osu.ppy.sh/ss/19371956/cbe3
(ignore aesthetic)
AR can be lowered to 9.2, since BPM isn't very high and this is a lower Expert. OD could also be lowered to around 8.5.
00:00:978 (1) - 00:06:464 (4) This section should have a lower SV. Right now, it's the same as the chorus, which isn't good for contrast. This is a calmer section, so you could lower SV to around 0.8x - 0.9x.