I also think you are doing well . The most important thing is that he sees a loving and equal relationship modelled in his home .
That he doesn’t see you doing all the dogsbody, Unrewarding and unfulfilling work while your husband does the interesting, rewarding and paid work .
You and your husband need to challenge any unpleasant stereotypes you hear from family about your work situation. I know your DS is too young to understand now but you can’t let it go now and then start when he’s 6.
Opening doors for other people is good manners, I encourage all my children to do this for people. I would never take issue with a man who does it for me and I open doors and give up seats for anyone who needs it more than me - disabled people, very pregnant women, elderly people , those carrying toddlers etc .
It’s irelevant to feminism IMO.
In your situation I’d be more concerned about wifework and emotional labour and making sure that you and your husband share this.
I’d also challenge any stereotypes from friends politely .
“ oh he’s so full of energy, boys are like that “
“ actually lots of toddlers are like that, boys and girls “.
“Isn’t that funny, he’s playing with Emma’s doll! “
“ He probably thinks it’s his as he has one just like that at home” .
The hard stare and smile are the important bit. If you sound remotely apologetic or feel you have to explain in some way, they will sense your uncertainty and start to argue with you. So be polite but firm.
As long as you provide a variety of toys , your child will play with them. This happens naturally in families with boys and girls.