Help me with lovelace

So I just got home assistant, And downloaded hacs on it. How do I use lovelace on my dashboard? Im so confused. Also I have a You have 2 Lovelace elements that are not loaded properly in Lovelace error in hac. So i’d like to know how to enable lovelace cards and fix the lovelace elements not loaded properly.

For most practical purposes, Lovelace is the Dashboard. Custom cards installed from HACS can be added to a dashboard by clicking the Add Card button, they are usually near the bottom: