The last two days my friend and I have been trying to finish off our Lilith altars to be ready for season 1 and I think everyone is doing the same. Every time I roll up to an altar at least one person but usually two or three people come charging in on their horse. It's fun to be here at the start of this game's journey and seeing everybody getting ready! I think I'm gonna try Druid when the season starts ๐ป
You can ignore them if you want, or grab them while you do the story in the season if you want. I've leveled a couple of alts to the nightmare dungeon stage, and with some of them, I haven't touched a single side quest. I do world events and dungeons to level. On other alts, I'll do side quests if I happen to see one, or I'll pick it up from the quest giver and if I happen to be near the objective, I'll do it.
Seasona reset everything every time they start (except this first one where they're keeping some of the world stuff). You can do the reset stuff, or not. It's up to you. But I wouldn't quit over it because it's not really required.