Well, away from official races unless you have a) practised and b) qualified decently. You can gain decent SR and iRating if you stay out of trouble by qualifying up front and staying out of trouble, or if you don't race, 30m quali sessions are useful for SR. But yeah, maybe stick to the unofficial series this week.
MX5 is enjoyable.
I finally won inRacingNews Challenge Season with MX5 Roadster
Great experience is 24 Heures du Fun in this 13th week.
If you can survive first laps, than its a good racing.
5 different cars on one track. I was third from 60 drivers with Cadillac on Spa (only first five car finished in one lap)