Recovery the os on jetson nano j1020

I bought the jetson nano j1020. After that, I bought the SSD to install into jetson and I transferred the data to SSD. I thought the process ubuntu had been installed to SSD. and then I make my mistake to format emmc because the storage was almost full. After that, I restart the jetson and The screen is off. I try to flash jetson but It only shows the Nvidia logo and does not go anyway to ubuntu. The question is “How I can install ubuntu on jetson”. It is possible to fix it on my own without sending the device to a local shop Thx for any tips or advice me