I want to change my password and i don't want people to think that i am a hacker (which will degrese my reputation)
should i say that i am the owner of my bitcoin wallet address (now) and then change the password and sign a message from the wallet address that i shared here ?
and what should i type in the signed message ?
You could go to meta on the signed staked address'es. If you have one staked there write after you change it write a message that can be verified by staked address.
But if you don't have one staked it would not prove much if you staked today and changed password today.