This is a nice overview of RR3 related sites, done in a great video by ME7. MyRealRacing.Club is featured as well.
These are the direct links to the sites featured in the video:
Real Racing 3 Wiki Fandom https://rr3.fandom.com/f?catId=238929...
Real Racing 3 Trackside on Facebook https://www.facebook.com/groups/RR3.T...
Real Racing 3 Fandom Discord https://discord.gg/7YwMPgC
My Real Racing Club https://myrealracing.club/
Real Racing 3 on Redit https://www.reddit.com/r/RealRacing3/