I haven’t touched the game since Shadowlands, any pointers on how to relearn the game? I’m an excited feral main

Hey!

Been playing feral for almost 20 years, but I missed the Dragonflight expansion. I stopped playing mid Shadowlands and so much have changed since then it seems. New talent trees etc. Could someone please explain to me what I missed and maybe give me a link to a quick guide for semi noobs going from the SLs expansion.