To start a rental on Getaround, you'll have to complete and sign the rental agreement. It's the owner who has to download the contract (paper or mobile) and make you sign it at the beginning at the rental, after you completed it together. As a driver, you can't access it beforehand.
If you realize your personal information on the contract is inaccurate, you can correct it from your Getaround app on Other > Your profile > Edit your identity > Save. The owner will have to download and print the paper contract again, or simply open the mobile contract in the app Getaround, click on the three dots in the right upper corner then click on "Reset agreement" to see the modifications appear.