My address is from Electrum mobile wallet. How do I know if I can sign or how to sign. Can you point me to any link?
You can not sign a Bitcoin message using the electrum mobile wallet since it lack that feature. The Desktop version has it, though.
Do you have access to a computer?
You could also use other mobile wallets like mycelium, coinomi that can sign a message if you don't have a computer.
I have a computer but it is not secured. I have an idea, maybe I will have to import my wallet in the desktop electrum wallet, after signing I will uninstall the wallet.
Meanwhile, I will use some YouTube tutorials to know how to sign. Thanks!