Hi Abdulrahman,
Coming from an Engineering background myself, I feel your pain. Although PrepLounge is a great platform to leverage, you will need to complement it with other tools at your disposal.
Let me try to help you with my answer, but feel free to reach out in case you have any other questions:
- Complement your basic business knowledge gaps: this is a very important first step. Although you don't need to be an expert in business (no company asks for that), you should know the basics. You can use many materials, but I recommend you leverage the existing content on YouTube (look for Essential Business Concepts). And during your interviews, remember: if you are not familiar with the concept, ALWAYS ASK!
- Understand what Management Consulting firms look for in candidates: This is where you should focus next. You need to understand very clearly what type of skills your interviewers will be looking for during the interview, and why. Victor Cheng's book Case Interview Secrets is a good short read for you to get a sense of why the recruitment process is built this way (although be mindful that this book was written +10 years ago, so some things are no longer 100% true)
- Become a master at these skills: After understanding what skills consulting companies are looking for, you need to practice them until they become natural to you (structuring problems, being MECE, communicating clearly and with structure, etc.). There are many free resources online you can use (hit me a DM, and I'll tell you my favorites).
- Practice with real case problems: This is where PrepLounge can be a great resource. After you start to feel comfortable with the process, it's time for you to practice with cases and mock interviews/coaches at PrepLounge. Feel free to reach out if you need any guidance!
I hope this helps you (and all the others reading this) kick-start your preparation! This answer is focused on the “case” part of the interview. Don't forget you also need to prepare for the test/game, the fit/personal part of the interview, and the final questions, but I'll leave these for another answer.
Good luck!