Issue with "X" starting up.

Wasn't exactly sure what to put for the subject.

I've used Ubuntu and Mint plenty, but I'm way too reliant on GUI, so I'm getting slackware on my laptop with the intent to use it as my daily and force myself to get a deeper learning of slack.

So, I've installed Slackware64-current.
I've been using/following the slackware beginner guide doc, but I've come across an issue with getting X to work/configure.
Connected to the internet fine. Updated slackpkg gpg. Made a user.

installed right now are
xf86-video-ati-19.1.0-X86_64-1
xf86-video-amdgpu-19.1.0-X86_64-1
(including these because I THINK it's a driver issue?)

Currently I have not editted /etc/inittab to start with the GUI yet. I have tried that previously, but it just loads to a black screen.

When I type startx I get

vesa: Refusing to run on UEFI
(EE)
fatal server error:
(EE) no screen found (EE)
(EE)

server terminated with error (1) closing logfile

xinit: giving up
xinit: unable to connect to X server: connection refused
xinit: server error

I go to check the log file and find

(EE) open /dev/dri/card0: No such file or directory
Screen 0 deleted because of no matching config section

Devices detected, but none match those in config file

I wasn't sure if I needed to edit the xorg.conf file? Download drivers? (if it's download drivers, how do I go about doing that in command line?)
Trying not to sound too uneducated. I'm not afraid of doing work, but can't seem to find a way to fix this.