help with checkpoint data and genesis block // creating altcoin

[mironkraft]

hi there guys, im newbie and im learning/creating altcoin, for now i am following this tutorial:

https://medium.com/@jordan.baczuk/how-to-fork-bitcoin-part-2-59b9eddb49a4

1 - right now, im stuck at Checkpoint data, where i dont understand exactly what i have to do:

// Line 246
checkpointData = {
    {
    }
};




2 - second, i dont understand how to generate the Genesis Block, nothing at all, im for now stuck since it is not clear at all what i have to do exactly...

any help will be apreciated