Holy smokes what a difference M+ 10's are
I have been for the most part a solo player with an occasional friend now and again. I have not progressed raid or done keys much higher than a 5 since like season 3 of Dragonflight. My guild was kind enough to run me through a 10 last week and I kinda held my own, hitting the right interrupts, using mass dispell when needed, (I'm playing Shadow Priest this season), using my defensives... I was 3rd on the DPS chart, but only by 15k or so. That's a lot to be sure, but my guild mates run like 15's 16's and 17's.
I listed up my 10 today and HOLY SMOKES is it WAY easier than I expected. It's a night and day difference from a 6 to 10. I've read about people saying it's "easier" when you hit 10's but as a filthy casual, I'm here to tell ya, it is.
Learn the mechanics, learn what's important to interrupt, use your kit, and you'll have a blast playing these keys.