Alright. Your teammates can sign up already as well. Just make sure they reach the required ratings before the races. The lobby will block anyone who doesn't have them.
For right now we just focus on the Gr.4 series to see if everything is working in terms of lobby settings and competition. Also the popularity is important. If we don't get many people to sign up for the Gr.4 championship it'd be useless to start Gr.3 and Gr.1 as well.
If everything works out as planned the other two championships will start immeadietly after the Gr.4 one.