The site is Coinmama.
That sounds legit.
I got it from the top of the wallet.
I went to the Electrum.org site for the download. When I purchased the bc I was asked to enter the wallet address. I put in the 1N8vh.... address on the top of the wallet. Should I have chosen an address from the list of addresses? If so, I was unaware of that.
What do you mean with "from the top of the wallet"? The top-address on the Addresses list is fine. If you would have created one on the Receive tab, that's fine too. I don't have an address "on the top", so I'm not sure what you mean.