You don't have to do anything to your 2016 return.
You can still make a ROTH contribution until April 18, 2017 for 2016.
The 1099-R you will receive in 2018 for the 2017 tax year will only tax you on the $56.09 earnings that you received in 2017. I don't believe there is any way around that.
You will not have to amend 2016 since you received the money in 2017.