Yeah--I've been questioning my parenting skills lately because my 5yo is in a super defiant, ill-mannered phase. He doesn't listen, he whales on his older sister, he pinches, etc. It seems like nothing I do is working and he used to be a complete sweetheart. I don't remember his sister being like this (though she definitely had the same not listening/defiant streak at this age it wasn't as aggressive). When he acts like that, then his 8yo sister (who is normally pretty well behaved now) retaliates and it's just a downward spiral. I just feel like I'm constantly yelling or redirecting or being frustrated instead of enjoying my kids, and no one is getting enough attention. We just got back from vacation, and I feel like my kids are always the ones acting up in public and it's embarrassing.
For OP--the National Park Service does free learn to bike classes at Jones Point Park and Turkey Run Park. That's how my daughter learned to ride--and there were a mix of ages including adults. Here's the info:
https://home.nps.gov/gwmp/planyourvisit/learntoride.htm
It's a one time class on a weekend morning so not a huge time commitment.