97 days of playtime on my Warlock, but...

All of those hours are from 2011 or before. I haven't subbed in 14 years until now. So I basically feel like a wownoob again. I bought a month just to see what's going on, and I'm completely overwhelmed. I have no idea what I should be dong other than leveling. I'm currently level 50, will cap out at 70 unless I decide I want to buy TWW. I guess my question is, are there any resources online for people like me that used to be moderately proficient at playing their characters but are now totally lost? Any guides on what I need to catch up on? Any content from older expansions it would be advantageous for me to go through to pick up buffs of any kind that are still relevant? (I did get dragonflight already) Thank you in advance!