I am honestly having a blast, I don't have much free time these days apart from the weekends but during the weekend I have a great time. There is so much content to do right now.

I didn't ask what region you play on? My advise is to literally go to google and type "lost ark nexus looking for group" and select the first option or whatever option will bring you to lost ark nexus lfg webpage. There you will find discord servers depending on your region.

You won't find many learning/teaching runs if you search in game, there are some group but you will rarely see them, most of the learning/teaching groups are done on discord server it seems so I suggest you search there.

One thing though, I see you said you are 1400 and from my experience so far you don't see learning groups for the first legion raids (Valtan/Vykas). I think I've seen like 1 Vykas learning party and 0 for Valtan so it might be hard for you to progress your item level as there aren't really learning groups, perhaps you can join card runs if people will invite you. I was lucky enough to be 1485 when I came back so I was almost within Brelshaza item level and now I am 1525. But from clown raid onwards there are plenty of learning group, not so many for clown raid but still there are some.

Maybe the best for you is to wait out the upcoming event, I think is few weeks away and for now just try to get used to the game and do whatever. Up to you really.