can someone help? im stucked on last step and got this message..
mandatory-script-verify-flag-failed (Signature must be zero for failed CHECK(MULTI)SIG operation) (code -26)
Sounds like you only signed the transaction with 1 private key... you need to sign with at least two private keys as it is a "2-of-3" wallet.
Also, when signing with the 2nd key (2nd signrawtransaction), make sure you use the output from the 1st signrawtransaction command as the HEX, so the flow is:
createrawtransaction -> unsignedHEX -> 1st signrawtransaction -> partially_signedHEX -> 2nd signrawtransaction -> fully_signedHEX -> sendrawtransaction