The SSH daemon is disabled OOTB and needs to be enabled and started first with below:
sudo systemctl enable --now ssh.service
The sshd daemon doesnt allow root logins OOTB:
pi@ph5b:~ $ man sshd_config
[..]
PermitRootLogin
Specifies whether root can log in using ssh(1). The argument
must be yes, prohibit-password, forced-commands-only, or no.
The default is prohibit-password.
If this option is set to prohibit-password (or its deprecated
alias, without-password), password and keyboard-interactive
authentication are disabled for root.
EDIT: Ow one more remark/request, whenever possible, try copy/past the output to here as text (like I did above^) instead of screenshots pls?
You can format the output here with the </> button before posting.
Easier for us to copy/paste from and makes searching for others with similar problems easier.
It would just be wired connections using the Rasberry since I plan on buying an Ethernet switch before a router. The Raspberry can't give off WiFi signal for IoT devices to connect to, right?
But for now, I would advice to not complicate too much!
First get everything running and tested on a single network and get a bit more familiar with the workings of Pi-hole.