Insurance Query for sign up?

Hoping someone might be able to help with an answer, I'm currently signing up for Flex and just sent off for the background check but I can see that soon it's going to ask me for proof of Insurance.

Do Amazon expect you to just already have Hire & Reward Insurance even though it could take 6 months to finally get signed up for it and be approved. Could I take out like a Zego hourly policy and send them proof of that although it won't be that insurer I'm using.

Hoping anyone can help and tell me what they did...thanks