In my opinion, your map is pretty messy on visuals, lacks structure and has issues with rhythm, both of which don't really lend coherence in the map. It's also your first map so I'm not going to be too hard on it but I'll just note what I found wrong, which are mainly the two things I mentioned earlier.
Structure will come as you consistently keep mapping and make an attempt to remain consistent in your mapping (things like keeping consistent with slider velocity and distant snap) and since this is your first map, for this I'm just going to say map more and focus on the other aspects first.
Visuals are easier to fix because it's just adjusting small placements here and there and making sure your patterns have some sort of consistency in them. Consider 00:02:000 (1,2,3) - which repeats itself two more times before changing rhythm. You can make these have a similar shape or similar pattern movement like the triangles you have or something entirely which conveys the motion in the music considering the piano you have.
There are rhythm issues there as well but to explain this, I'll just start straight up modding your map in entirety, as much as I can find. I'll avoid repeating myself as much as possible.
00:02:000 (1,2,3,1,2,3,1,2,3) - you can improve expressing the piano with something more creative; think of the motion you want the player to take. It's also not quite
00:05:375 - there's actually a note here that can be clicked; the timeline up at the top looks something like this
https://osu.ppy.sh/ss/892808900:08:375 (2,4) -
https://osu.ppy.sh/ss/8928093 to make it cleaner if you want that movement or
https://osu.ppy.sh/ss/8928099 since the repeat changes the direction you are aiming
00:10:375 (2) - don't be afraid to express notes in the music like these with sliders; sliders fill the timeline and keep people from getting bored while playing
00:12:375 (2) - I think this is better with two notes instead of the slider
00:14:375 (2) - mentioned this up above at 00:10:375 (2) -
00:26:375 (2) - you can add a slider here too like what I said earlier
00:30:375 (2) - ^
00:34:000 (1,2,3,4,5) - try this rhythm in the editor because it's more active because you're clicking more objects:
https://osu.ppy.sh/ss/892817200:39:375 - there's actually no note on the blue tick that I just highlighted; if anything I'd say the rhythm in that part looks like this:
https://osu.ppy.sh/ss/8928119 (readjust the note placement; whats more important is what I highlighted in the timeline); I also recommend something like this too:
https://osu.ppy.sh/ss/8928187 because it shifts more focus to the active parts in the music
00:44:000 (4) - you can actually place a note here and start the spinner afterwards, like this:
https://osu.ppy.sh/ss/8928190And the rest of the map could be worked on in terms of note placement but the rhythms are good! It seems like you got more comfortable mapping as you continued working on it, just need to focus on making it consistent and making sure rhythms match up.
One thing found near the end of the map that I noticed that you also do is that sometimes your notes don't match up to parts in the music that actually demand the emphasis. I've already listed some examples up above but 00:39:375 - comes to mind first so you might wanna look at that in order to reassess where you're placing notes in the timeline.
It's a little tricky for a first song to map but I think you can do something nice on it, so see if you can fix it! If you have any further questions or anything just message me on discord (Silent#7708 is my tag), I'm generally around most of the time.