There are clothing, hair, currency, and mannerisms to consider, including practicing walking. If Tephra's not back by tomorrow, the council would be crazy not to send you, and you need to be prepared. There's still so much more left to do, to study, to experience. Memories to make. You don't want it to end.
If mortals can deal with their mortality, then so can you, right? You flit about with frustration. How do mortals deal with it? Just this perpetual dread? How can they enjoy anything, do anything? You look at your bags. You're finding it harder and harder to feel motivated about collecting anything.