My kids all race, as do I. Although this year I missed out due to injuries and work.
Youngest daughter

Middle son

Oldest son

Can't find any photos of me just now.
Anyhow, go along and have fun. I ride 20's and cruiser. They are completely different. 20's feel very twitchy when you first start on them but you get used to it. Going from them to a cruiser and the cruiser is like a barge lol. But it's much more stable and carries a lot more speed. To be honest I love them both, 20's are more exciting though.
The clubs are ace, it's a good family sport and most people are cool. I help run a club and we offer all new comers their first 2 races for free as a taster. Most come back and have a great time.