I was in the same boat as you a while ago. I discovered what Everquest was at all three years ago when I was 17. I was getting frustrated with World of Warcraft so I installed P99. Of course I was hit with the fucking whiplash of how different EQ was (MUCH slower combat, stiffer spell animations, mobs your level being usually impossible to kill, no map, bag system, spell scrolls)
All the game's negatives are outweighed by its positives. Everquest spells are creative and interesting, classes have a variety of different non-DPS uniqueness (buffbot shamen, CC master enchanters, wizard raid portals, the guild of druids that use their group portals to roleplay as taxis for money)
The dungeon system is INFINITELY better too. In wow and wow clones you match up with randoms to clear a 10 minute straight lines of boss kills and get showered with loot then leave. In Everquest dungeons are non-instanced, non-linear zones the size of entire player cities (massive enough to fit multiple groups farming at the same time), with multiple rooms of respawning adds and bosses being more like rare mobs. You go there with your group, and you camp a room as it respawns for a xp or for loot. I prefer it because of how real and bustling with people and things dungeons feel as opposed being forgettable disneyland rollercoasters you get in and out of with your brain turned off.
If there is one singular thing I want you to remember about EQ is that it's exponentially more fun than any other MMO BUT the fun kicks in multiple months after you start playing. Because at first you will die a lot, and the first 15 levels of any class is a boring slog since you don't get any unique moves, but I promise you after that bottleneck you'll leave your starting zone to start exploring and that's when you'll have the time of your life.
Check out how varied EQ's mob grinding zones are.. Just looking at the screenshots is enough to make me want to log in rn
https://wiki.project1999.com/Per-Level_Hunting_Guide