hey guys i just start harvesting with 12k vested xem and i want to know how much longer i should wait for my first blocks?ty

No good news to you sir. My supernode get one block a day now and it can be 0 so you probably have to wait 300 days with such ammount,
but luckly u can harvers on super node without cost.
I'm at 7,500 vested. Will there next week! Then I'll start harvesting. What's the best machine to harvest off of?