I need help ┗( T﹏T )┛

Hi hi! So I need help with css, I'm learning a bit but I still need help how to deal with css. I would be grateful if you helped out!! ㄟ(≧◇≦)ㄏ
Thank you!! and thanks very much if you decide to help out!!
https://th.bing.com/th/id/R6ed152423c09e8f7752370494d6b9c36?rik=9s3TscqAqoJE1g&riu=http%3a%2f%2fgifimage.net%2fwp-content%2fuploads%2f2017%2f10%2fhappy-anime-gif-1.gif&ehk=mQqbfGy8YPUGI%2fPz2pw3FB22roqlY3%2bw6meAkrOo3o0%3d&risl=&pid=ImgRaw