No GUI error after installing debian buster

I have installed Debian 10 on my laptop Dell Inspiron . But when booting first time into Debian, It directs me into the command-line interface, why? I am sure, I have chosen Graphical Install during installation. Is it related to the graphics of my laptop? My laptop has **AMD Radeon R2** graphics and I am using the SDDM Display manager. It has **AMD APU Dual Core E1** processor. I have installed **KDE plasma**, **LxDM**, and **Lxqt** in the select and install software step during installation. I have chosen SDDM as my Display manager between **lightdm** and **sddm**.