Fastest way to learn Excel for data entry job

Hey everyone.I’ll be honest: I said I know Excel on my resume, but in reality I know almost nothing about it. I just got hired for a data entry position and I have 10 days before I start.

For context, I’m a telecom engineer, so I’m comfortable with programming concepts, logic, and learning software fast. I also know Word and PowerPoint well. I put Excel on my resume because I thought I could pick it up easily if I really had to now that time has come 😅.

So my questions are:

Is 10 days enough to become good enough at Excel for a data entry job?

What exact Excel skills should I focus on first?

Any courses / YouTube channels / playlists you recommend for a complete beginner?