How to use this application

Hello, I’m a Chinese student. I’m using this application for the first time. I don’t know how to use it.
I want to use this app to make the game material I want.Can you help me?THANKS!

大家好,我是中国的学生。我第一次使用这个应用。我不知道怎么使用它。我想要使用这个应用来制作我想要的游戏素材。你们能帮助我吗?谢谢。

I know that there are great differences between Chinese websites and foreign websites. In addition, I can’t understand some English at all. So I ask you to help me.