I'm gonna share my personal experience. When I first started the game, I was also part of the people who pressed buttons randomly. I was also part of the BRD group that I now despise--the mute bards. The problem was that FF14 was my first MMO ever, so I had absolutely no idea how MMOs work. And I don't recall the game explaining things a bit more in depth for people who, like me, were total noobs in the MMO genre. I should also note that I started the game back in 2015, so I don't recall how much guidance the game itself offered back then. Global Cooldown, Off Global Cooldown, AoE, DoTs, etc. I had no clue what any of this jargon meant. Mind you, I did make an effort to read my tooltips, but there were some skills that I couldn't understand. I remember I never used Barrage (and the OG BRD songs) back then because I just couldn't understand what it did. And I'm of the mindset that if I don't know what something does or how it works, I'd rather not use it because I don't wanna use it incorrectly.

Anyway, I was lucky enough that some time later on, the person who got me into the game (who also played BRD) gave me a few tips here and there, and they also told me about guides, which I had no idea such things even existed (again, being new to MMOs and all). And that's when my journey to get better began. Thanks to the guides, which explained my class more in depth, I was finally able to understand all my skills and when to use them efficiently. After that, I was finally able to become a good BRD, and I started to enjoy the game and the class even more.

I think it wouldn't hurt if the class quests made a bit more effort to explain what the new ability you get does or how it works instead of just handing it to you and expecting reading the tooltip to be enough. Sometimes the tooltip for a skill is an essay, and words aren't always easy to understand without some kind of an example.