There are 212 master nodes so you will be getting in line behind all of those so at least 227 blocks might past before you get your first rewards
https://chainz.cryptoid.info/btdx/masternodes.dwsYou can use the above link and look for your IP address and then you know your master node is working.
When I do "masternode count" from console that number is 343, which is different from 212 from cryptoid. I guess many that are listed as ENABLED in the wallet actually aren't. Unfortunately mine isn't listed among the 212. Wonder what can be wrong, and where to start debugging?