Resources for case interviews

Hi consultants!

So I want to prepare for case interviews for MBB and secondary category but there are so many resources and click-bait-ish free trials that you have to sign up for. I don’t know any case studies tbh, I am an economics grad and we only solved/proved optimization problems. I did not take any Business classes, which was a mistake. So, I came across to Victor Cheng however his material seems old (no offense) so I guess we are not using that anymore. But I liked how he structured his workshop. Are there any free resources like that? Such as starting with anatomy of a case interview and such. And I mean free free, not some lead generation data collective “sign up for free trial” thing.

And I kinda know what a consultant is but case interviews should be studied imo, it’s kinda different than the job itself in a way that it is an interview process. Case interviews are a prototype of the job imo but in a work environment you have more respurces than an interview, that’s why I want to study for them.

Thank you so much.