I just tested it in testnet4 Electrum and it accepts any address from other wallets.
Thank you for testing that.
I don't know what @3robins meant by "pre-script" though.
He probably meant what we prepend to the private key to specify the script type in electrum, like "p2wpkh-p2sh:"
Yes, correct.
You can enter your friend's address in the sweep window and all the funds in the paper wallet will be sent to that address. You don't need to add any prefix to the address. Prefixes are only added to private keys but you don't need to do that either.
Excellent, so I have the green light at bottom right corner to show Electrum is connected to server, enter my paper private key that starts with a "5" into sweep window, then enter my friends wallet address that begins with "bc1" into the "send to address" at bottom of the window, then click the sweep button..... Now what should I expect to happen after that? I'm not interested in setting or negotiating lower fees, I would prefer to use the default fee structure because I don't want to low-ball that might cause delays and prefer an efficient transaction (I don't mind paying the fee).