Stay Home, Make Game — Day 2

After a whole day of torture by Unity problems (see Day 1), I can finally start building my first Tilemap. Let me recap what I have got so far:

I use Unity 2019.3 to create a 2D project, aiming to create a 2D game based on a Hexagonal Tilemap. I have downloaded an asset package as well as 2 Unity packages via the Asset Store and Package Manager respectively.

Then, we add a tilemap via menu: Game Object > 2D Object > Hexagonal Point Top Tilemap. Two game objects will be added to Project Hierarchy, Grid, and its child Tilemap.