I need to get good at digital marketing fast

Throwaway, basically oversold myself and got a head of marketing position at a brick and mortar company. I'm years out of date in PPC and Social media marketing.

I know all the basics and used to run decent 6figure monthly ad spend account but that was years ago and I'm rusty Af.

Anything other than the weirdness of the move from adwords to google ads that I should be aware of? Any major changes that you all have seen since 2019? Is tik tok converting well for any of you?