[quote=@AwesomeZero5]
For relationships, should we just put TBD?
It seems you want it for character connection, but that may take a bit-.
[/quote]

[i]You put whatever you want to actively RP[/i]. ;)

Usually, the Relationship aspect is used to connect you to another player character right at the start of the game like you said, so you immediately have a connection to RP with. But it's really not a hard rule. If you have another kind of relationship you want to explore for your character, feel free! Else, you can leave it 'TBD', and then later if we have enough people, we can match up. 

Also, do note that this doesn't need to be romantic, or even a positive relationship. It could also be about a friend, rival, family, your favorite barmaid, whatever. 

And don't forget that Aspects can change in Fate during play, so don't feel like you have to get it perfect immediately, or even be bound to it for the long run.