This is my very first time working with development Board, so I am going to create an Ubuntu Image SD card for the Nanopi Neo core 2.

So I found the nanopi-neo-core2_sd_friendlycore-xenial_4.14_arm64_20191219.img image file and burn it on to the SD cards by Win32DiskImager.exe. After that my Sd card partition divides into 3 ones. G,H and I. So I pluged in the NanoPi Neo Core 2 into its shield and power it on. but nothing has happened . should the Ubuntu Image flash into eMMC automatically?
is there any instruction for beginners? at what point should I use eflasher? and I cann't find XXXX-eflasher-YYYYMMDD-full.img.7z for nanopi Neo core 2. where can I find it?
any help would be apreciated?