The idea of seasonal slots is to help bring characters to Helovia that have magic/companions that are integral to their design (aka ones that if you had to earn their magic here, it would fundamentally change something important about the character). It isn't meant to be a reason to make a new character .
And yes of course! Start a wishlist now!! :D
Based on what you've said, I would advise not entering, since you don't have a character in mind that needs these things to join, and because you couldn't make it for 3 weeks.