How much effective will be reading pages of ArchWiki if I use Opensuse TW? Is there any better resources for learning linux?
The ArchWiki is the best source to use when it comes to Linux as it’s documentation can be used on just about any Linux OS.
The key is to make sure you use the right OS’ command structure to complete what you are doing. i.e using the correct commands for package manager and correct package naming scheme.
If you are unsure you can use the man pages and the opens use documentation.
The Debian wiki is also pretty good
95% of the arch wiki isn’t arch specific, it applies to all distros, just happens to be maintained by arch people. This applies to most other Linux wikis, like the Gentoo wiki.
Archwiki and others like Gentoo wiki translates pretty well into other distros but keep in mind your toolset and availabilty of packages may be different. Not all distros have systemd and some might use different programs to configure the network and so on.
Arch wiki translates pretty well, but I recommend comparing it with the opensuse wiki, because some stuff doesn’t line up.
Personally, I encountered an issue with tumbleweed secure boot, where the tumbleweed implementation didn’t work. Switched back to arch after that.