This is something we should all be doing as part of our linkshells. My main linkshell on Selbina is always happy to take in newbie players, we've taken in at least half a dozen in the last couple of weeks and we help them get started. We tell them how to make gil, we put them in touch with crafters, tell them how the game works, help them level and do events, we do NM runs for them. Most of all we make them feel welcome and part of the community. I'm in Rust linkshell if people want help.
One piece of advice I'd give to anyone rolling on selbina is to get to know a Lalafell. The lala only linkshell Lemmings is just about the most useful contact you can have on the server and the most helpful and nice bunch you could meet.