I finally got my masternode UP 
How do I can check if is working fine? Any advice?
How do I can check if is working fine? Any advice? You can try this command:
-cli masternode count
If that number is less than 300 you have to stop and restart the daemon to let it resync. In the worst case you have to replace the blockchain with a backup, unless there is a smarter way to get back on the right chain.