I have sent friend invites to everyone who gave me full name.
That is Toonname@Cryptichandle for example. Without a character name attached to your handle the game will not let me send the invite.
Once you are on my friends list we can see when we are playing. I will check my friends list and if I see enough of us on at once to form a full team of five I will send a team invite to you. I think (based on how it worked in Champions) that all five team members will have to show up at Spacedock to form the Fleet.
So, if you are playing one day and you get a Team invite from aelius (whichever toon I am playing) please accept. If you are in the middle of a mission get back to me as soon as you can and let me know how long you need to finish and I can invite you when you are done and off of your team if you are on one.
Currently I have three toons, Elric, Coryn and Ferretti. You can find me, if you are looking, under one of these names @aelius.