How to use foliage?

I started with UE4 literally yesterday and this foliage system is not working for me. I understand you have to take a grass mesh or something of the sort and then brush it along the floor, but I have some problems with this.

My floor is unnaturally white,

I dont have any grass meshes in the content browser unless I’ve skipped over something

Just pretty lost as a level editor. I have gone to “Quick-Start level editing” and used the tutorial in the engine its self already.

Can anyone help?

Yes my friend. Search on youtube for video tutorials. there are many. good luck

Thanks for the response.