What do I miss if I take it comfy on launch?

[Risvertasashi]

Say I take 3 months to get to Endwalker endgame. Is there any weekly tokens at launch or anything that will put me behind?
Or say I just take 1 month.

weekly tokens come in at the 1 month mark, and there's a bit of weekly, lowend gear you can get from the normal mode rids at the 2 week mark.

So if you get to the end within 1 month, you won't miss anything terribly meaningful, and if you get there within 2 weeks, you won't miss anything at all really. 3 months would put you behind a bit in gear but you'd catch up.

But this doesn't matter unless you want to do savage raids.