caprea
Please try another kernel, they are easy to install with control-centre > software > package installer > Kernel.
You can also update your 5.10.57 to the current kernel 5.10.104 this way by installing it.
By default the system will always boot into the newest kernel, so if you want to boot into 4.19 you have to do this with the advanced options in boot menu.(The boot order can be changed later if you find a better working kernel)
Display: x11 server: X.Org 1.20.11 driver: loaded: modesetting,nouveau
unloaded: fbdev,vesa failed: nvidia alternate: nv
resolution: 1366×768~60Hz s-dpi: 96
OpenGL: renderer: N/A v: N/A direct render: N/A
It looks like something went very wrong during the installation of the nvidia driver.
nouveau is still loaded here.There is no OpenGL.
How did you install the driver?