Need Help regarding my display driver

I am very new on linux, having zero knowledge about anything.
When I try to update my display driver, I find these errors, pls help mw

Waiting for user input…

Installing video-nvidia-340xx…
Sourcing /etc/mhwd-x86_64.conf
Has lib32 support: true
Sourcing /var/lib/mhwd/db/pci/graphic_drivers/nvidia-340xx/MHWDCONFIG
Processing classid: 0300
Sourcing /var/lib/mhwd/scripts/include/0300
Processing classid: 0302
:: Synchronizing package databases…
warning: lib32-nvidia-340xx-utils-340.108-1 is up to date – skipping
error: target not found: linux59-nvidia-340xx
core is up to date
extra is up to date
community is up to date
multilib is up to date
Error: pacman failed!
Error: script failed!


You will have to start reading the discussions in the forum, and also the announcements.

The video driver you used is no longer present in MHWD, hence

Depending on your GPU model, you might switch to video-nvidia-390xx

How can I, switch.

I am facing screen flickering issue due to this.

Please explain to me in