Thank you for your post and screen shots.
I see the CREATE_FAILED shows the specified instance type can only be used in a VPC. Do you already have an account with AWS? If so, then contact AWS to get it upgraded. Or, you can create a new account and install again.
Are you using an existing FileMaker Server License or purchasing a new license?
I had an existing account. I'll get it upgraded or will create a new one. Thanks!