I had the exact same problem with a Lenovo laptop when trying to get Mint on to it for my partner. Unfortunately I do not remember how the hell I managed it because I had the same issue as non of the keys would get me where I needed to go. I know I held the key before turning on the computer though, and I am pretty sure it was the esc key.

Sorry I couldn’t be more help. But lenovo laptops can eat all the dicks. haha