How can I get really good at excel really fast? Basically my job requires me to self learn super advanced excel things, and I have no idea where to start. I know like basic functions and tables that’s about it. So is there like a super guide that I can read or something like that? I need to end up knowing how to implement matrices and randomness into excel

Update: wow thanks for all the advice guys! I’m at work now but I’ve been reading through all the comments and I have a place to start now! Thanks! I’ll be on this sub a lot more from now on!