Kind of New to Arena, Struggling bad need some beginner tips

So i did play Arena for a short time in Dragonflight, i just got back into it a couple days ago and wow its been rough for me. I try to do different things like i will notice i use Vanish/Cloak too quick so next match i try to hold off from using it too early and it comes back to bite me where i don’t get 1 vanish off and get completely destroyed. I know what the rotation is suppose to be. I am having trouble being able to constantly CC the other player we are not focusing. I do use blind pretty good. What is some of the best advice you have gotten on how to get better at Arena? What advice impacted you the most and made you play a lot better in Arenas?

If you haven’t already done these, I suggest you check out my 2 posts on a similar thread: Affliction warlock pvp - #7 by Kinsington-stormrage