Database_K has 2 dependencies, the dimension datapack, and the resource pack from 1.1 and onward. Make sure you install both!
If you are not sure where to start, find a creative world and in chat type:
/function database_k:give_all_items
...which will help you get started. It will give you all starting items including the three build kits! When a build kit is dropped on a crafting table, it will create the multi-block structure(including summoning the checker entity). From there, follow the advancement tab in crafting all items currently available. If you notice, there are so far only one item is not added.
I would also suggest giving yourself the first advancement(in the command called thefulldatabase) it is the root and all the recipes because I have not yet added a way to earn them yet!(sorry, I procrastinate alot).
One advancement is called "Too Fancy To Be Cool" which you can get by giving yourself a tag you can find in the function under "Auras"
To get the custom textures items, you need to craft them, NOT give them to yourself!
There is two things so far I have noticed: 1, the tags create a whole lot of lag; 2, the dependancey is really annoying. I thank you for your patience.
Anyway, this has taken me half a year, so HAVE FUN!