Coming at the Job at 90 when you've lazy leveled it can make it harder to pick up as there's a lot of mechanics swamping you at once and can feel overwhelming. That's not a shot at you, I also just lazy leveled Monk without really paying attention. Good old Prae spam got it there
Late EW I started paying attention to it and it was... confusing and chaotic, not going to lie, but I was really liking the style of the job.
So I made an alt! Materia has the road to 90, so leveling was insanely easy. It allowed me focus on rotation, then beast, then nadi. My UI was also poorly optimised, so it helped there too. Everything I learnt I could apply to my main.
If that's not an option, my other advice is the Trust/NPC dungeons. Use them and just focus on rotation, ignore the rest. The new system is jarring at first, but recently I've been really pumped at how my flow is getting better and it's getting more fun.
Then introduce elements from there, reading up on like the Balance to help give you an idea where to try and steer and focus.
For me, rotation/chakra/nadi is mostly sorted. I have no idea on the burst windows. People keep talking about odds and evens and I'm yet to find what that even means! (I've mostly been healer in FFXIV) But it's not impacting the fun at the moment leveling in the MSQ
