Yeah same, got a bit fucked the same way. I have plenty T1/T2 bound shit on my main that I'll never be able to use, now I've learned the lesson but I guess I'll have plenty trouble leveling alts
Regarding the Adventure items, don't worry, take your time. There is no hurry as long as you don't have completed the Rapports anyway, and some cooking things are "gated" in World Bosses' RNG, so there is no need to rush all the buyable things.
I've started doing them last week to at least unlock all the masterpieces, adventures and skill points), I have most at 70%+ and one at 80% doing all the "easy" things (unique monsters, vistas, hidden stories, other stories, dungeons in both normal and heroic, the easy parts of cooking + the world bosses when available).
Then Rapports will take ages to complete I guess