I think you did a really good job for a first editing project. You have some great footage.
@Dale D had a lot of good comments. I want to double down on his comment about more color grading needed. But I think that can be the most challenging thing for newbies. I've been doing still color corrections for 20 years+ and still am finding good color grading a challenge in video, especially working with new equipment. Again, look to see if every shot has the color that makes you "feel" as you want it to. Small changes in hue or WB can make a big difference in the feel.
I sympathize with you about the hours and hours it can take to do a 2.5 minute project. Massaging one to its best self can seem to take forever. The last project that I did, after all those hours, when I thought I was just about finished, probably made 20 different revisions before I finally had to acquiesce to it being "perfect enough".
Since this is a critique area, I don't want to come of as critical, but just provide suggestions with a "fresh set of eyes".
There were a lot of really cool things in the video. The night shot of the city and the hyperlapse of the moon I think were my favorites, then followed by one or two of the sunset shots. I liked the speed ramp of ascending by the waterfalls.
I think this project still has some room for improvement, but the footage (some really good footage) is there. A few small things would be 1) Make sure you open to a clip while it's in motion. 2:05-2:10 was static. It's a great shot, and if the drone is stationary, just zoom in a bit with Premier in post to provide that sense of motion. 2) Cut out clips that have jerky motions. I saw at least one where that extra footage up thru the jerk wasn't essential. 3) Make sure your transisions feel right. There were a couple that I found drew my attention. (2:04 is one that bothered me. 1:05-1:08) Transitions shouldn't call attention to themselves unless there is a deliberate purpose for them to do so. 4) There were a couple places where you could have opened up the shadows a bit ( 2:14, possibly 2:24 ). I thought a bit more shadow detail wouldn't disrupt the sunset. 5) Sequencing. I really liked that shot at 2:05 but thought it might have more time relevance if it came after the bridge/sunset shot. JMO.
One or two other suggestions. Don't be afraid to zoom with keyframes. I might have liked to have seen that with the bridge at 0:19 then the kayakers. While you did pull back perhaps you should reverse that clip to zoom in and perhaps zoom in even more for effect? When you have similar clips, like going toward, then under the bridge, perhaps you might combine those clips and do something creative to have a sense of continuity? If it were me, I would cut out 1:05 to 1:08 entirely, which I think will make the transition to the waterfalls more impactful. There are a few other clips that could be massaged to make them more intersting.
Forgive my criticism, but I hope you found the comments constructive. I really think you've done a good job, particularly on the flying/shooting. Learning to fly, shoot and edit is like drinking out of three fire hoses at once. Again, bravo on your first project!