Yeah, I do that the first time and if I've been gone a few hours. I'm talking about when I do run a race and it finishes, and the sign up period for the next one isn't even open yet. I usually just close out of the game or go putz around in the driving missions.
I only really do well if I pick a car and practice at it and then race. I can't hop around too much. It's probably why I liked iRacing because the series changed every week so I would practice to the point of satisfaction until Thursday or so and then race on Fri/Sat.
If I were a natural that could drop in anywhere at any time I could probably find a rhythm with racing all three A/B/C races and not have to wait too much.